imapd.conf(5)
NAME
imapd.conf - IMAP configuration file
DESCRIPTION
/etc/imapd.conf is the configuration file for the Cyrus IMAP server.
It defines local parameters for IMAP.
Each line of the /etc/imapd.conf file has the form
option: value
where option is the name of the configuration option being set and
value is the value that the configuration option is being set to.
Although there is no limit to the length of a line, a ``\'' (backslash)
character may be used as the last character on a line to force it to
continue on the next one. No additional whitespace is inserted before
or after the ``\''. Note that a line that is split using ``\''
character(s) is still considered a single line. For example
option:\
value1 value2 \
value3
is equivalent to
option: value1 value2 value3
Blank lines and lines beginning with ``#'' are ignored.
For boolean and enumerated options, the values ``yes'', ``on'', ``t'',
``true'' and ``1'' turn the option on, the values ``no'', ``off'',
``f'', ``false'' and ``0'' turn the option off.
FIELD DESCRIPTIONS
The sections below detail options that can be placed in the
/etc/imapd.conf file, and show each option's default value. Some
options have no default value, these are listed with ``<no default>''.
Some options default to the empty string, these are listed with
``<none>''.
addressbookprefix: #addressbooks
The prefix for the addressbook mailboxes hierarchies. The
hierarchy delimiter will be automatically appended. The public
addressbook hierarchy will be at the toplevel of the shared
namespace. A user's personal calendar hierarchy will be a child
of their Inbox.
admins: <empty string>
The list of userids with administrative rights. Separate each
userid with a space. Sites using Kerberos authentication may use
separate "admin" instances.
Note that accounts used by users should not be administrators.
Administrative accounts should not receive mail. That is, if user
"jbRo" is a user reading mail, he should not also be in the admins
line. Some problems may occur otherwise, most notably the ability
of administrators to create top-level mailboxes visible to users,
but not writable by users.
afspts_localrealms: <none>
The list of realms which are to be treated as local, and thus
stripped during identifier canonicalization (for the AFSPTS
ptloader module). This is different from loginrealms in that it
occurs later in the authorization process (as the user id is
canonified for PTS lookup)
afspts_mycell: <none>
Cell to use for AFS PTS lookups. Defaults to the local cell.
allowallsubscribe: 0
Allow subscription to nonexistent mailboxes. This option is
typically used on backend servers in a Murder so that users can
subscribe to mailboxes that don't reside on their "home" server.
This option can also be used as a workaround for IMAP clients
which don't play well with nonexistent or unselectable mailboxes
(e.g., Microsoft Outlook).
allowanonymouslogin: 0
Permit logins by the user "anonymous" using any password. Also
allows use of the SASL ANONYMOUS mechanism.
allowapop: 1
Allow use of the POP3 APOP authentication command.
Note that this command requires that SASL is compiled with APOP
support, that the plaintext passwords are available in a SASL
auxprop backend (e.g., sasldb), and that the system can provide
enough entropy (e.g., from /dev/urandom) to create a challenge in
the banner.
allownewnews: 0
Allow use of the NNTP NEWNEWS command.
Note that this is a very expensive command and should only be
enabled when absolutely necessary.
allowplaintext: 0
If enabled, allows the use of cleartext passwords on the wire.
By default, the use of cleartext passwords requires a TLS/SSL
encryption layer to be negotiated prior to any cleartext
authentication mechanisms being advertised or allowed. To require
a TLS/SSL encryption layer to be negotiated prior to ANY
authentication, see the tls_required option.
allowusermoves: 0
Allow moving user accounts (with associated meta-data) via RENAME
or XFER.
Note that measures should be taken to make sure that the user
being moved is not logged in, and cannot login during the move.
Failure to do so may result in the user's meta-data (seen state,
subscriptions, etc) being corrupted or out of date.
altnamespace: 0
Use the alternate IMAP namespace, where personal folders reside at
the same level in the hierarchy as INBOX.
This option ONLY applies where interaction takes place with the
client/user. Currently this is limited to the IMAP protocol
(imapd) and Sieve scripts (lmtpd). This option does NOT apply to
admin tools such as cyradm (admins ONLY), reconstruct, quota,
etc., NOR does it affect LMTP delivery of messages directly to
mailboxes via plus-addressing.
annotation_db: twoskip
The cyrusdb backend to use for mailbox annotations.
Allowed values: berkeley, berkeley-hash, skiplist, twoskip
annotation_db_path: <none>
The absolute path to the annotations db file. If not specified,
will be confdir/annotations.db
anyoneuseracl: 1
Should non-admin users be allowed to set ACLs for the 'anyone'
user on their mailboxes? In a large organization this can cause
support problems, but it's enabled by default.
annotation_allow_undefined: 0
Allow clients to store values for entries which are not * defined
either by Cyrus or in the annotations_definitions * file.
annotation_definitions: <none>
File containing external (third-party) annotation definitions.
Each line of the file specifies the properties of an annotation
and has the following form:
name, scope, attrib-type, proxy-type, attrib-names, acl
name is the hierarchical name as in RFC 5257 or RFC 5464 (in the
latter case, without the leading /shared or /private). For
example, /vendor/acme/blurdybloop.
scope
specifies whether the annotation is for the server, a
mailbox, or a message.
attrib-type
specifies the attribute data type, which is used only to
check the string value passed by clients when setting
annotations. The attrib-type is one of:
string
any value is accepted.
content-type
this obsolete data type, which was useful for early
drafts of the standard, is accepted but silently
translated to string.
boolean
only the strings "true" or "false" are accepted.
Checking is case-insensitive but the value is forced to
lowercase.
int integers are accepted.
uint non-negative integers are accepted.
proxy-type
specifies whether this attribute is for the backend or proxy
servers or both (proxy_and_backend)
attrib-names
is the space-separated list of available attributes for the
annotation. Possible attribute names are value.shared,
value.priv, and value (which permits both value.priv and
value.shared). The attribute names size, size.shared, and
size.priv are accepted but ignored; these attributes are
automatically provided by the server if the corresponding
value attribute is specified. Some obsolete attributes,
which were defined early drafts of the standard, are accepted
and ignored with a warning.
extra-permissions
is the extra ACL permission bits required for setting this
annotation, in standard IMAP ACL permission bit string
format. Note that this is in addition to the permission bits
specified in RFC 5257 and RFC 5464, so leaving this field
empty is harmless. Note also that there is no way to specify
that an annotation can only be set by an admin user; in
particular the a permission bit does not achieve this.
Blank lines and lines beginning with ``#'' are ignored.
annotation_callout: <none>
The pathname of a callout to be used to automatically add
annotations or flags to a message when it is appended to a
mailbox. The path can be either an executable (including a
script), or a UNIX domain socket.
auditlog: 0
Should cyrus output log entries for every action taken on a
message file or mailboxes list entry? It's noisy so disabled by
default, but can be very useful for tracking down what happened if
things look strange
auth_mech: unix
The authorization mechanism to use.
Allowed values: unix, pts, krb, krb5
autocreateinboxfolders: <none>
Deprecated in favor of autocreate_inbox_folders.
autocreatequota: 0
Deprecated in favor of autocreate_quota.
autocreatequotamsg: -1
Deprecated in favor of autocreate_quota_messages.
autosievefolders: <none>
Deprecated in favor of autocreate_sieve_folders.
generate_compiled_sieve_script: <none>
Deprecated in favor of autocreate_sieve_script_compile.
autocreate_sieve_compiled_script: <none>
Deprecated in favor of autocreate_sieve_script_compiled.
autosubscribeinboxfolders: <none>
Deprecated in favor of autocreate_subscribe_folders.
autosubscribesharedfolders: <none>
Deprecated in favor of autocreate_subscribe_sharedfolders.
autosubscribe_all_sharedfolders: 0
Deprecated in favor of autocreate_subscribe_sharedfolders_all.
autocreate_inbox_folders: <none>
If a user does not have an INBOX already, and the INBOX is to be
created, create the list of folders in this setting as well.
INBOX folders are created under both the following conditions:
1. The user logins via the IMAP or the POP3 protocol.
autocreate_quota option must have a value of zero or
greater.
2. A message arrives for the user through the lmtpd(8).
autocreate_post option must be enabled.
autocreate_inbox_folders is a list of INBOX's subfolders separated
by a "|", that are automatically created by the server under the
previous two scenarios. Leading and trailing whitespace is
stripped, so "Junk | Trash" results in two folders: "Junk" and
"Trash".
autocreate_post: 0
If enabled, when lmtpd(8) receives an incoming mail for an INBOX
that does not exist, then the INBOX is automatically created by
lmtpd(8) and delivery of the message continues.
autocreate_quota: -1
If set to a value of zero or higher, users have their INBOX
folders created upon a successful login event or upon lmtpd(8)
message delivery if autocreate_post is enabled, provided their
INBOX did not yet already exist.
The user's quota is set to the value if it is greater than zero,
otherwise the user has unlimited quota.
Note that quota is specified in kilobytes.
autocreate_quota_messages: -1
If set to a value of zero or higher, users who have their INBOX
folders created upon a successful login event (see
autocreate_quota), or upon lmtpd(8) message delivery if
autocreate_post is enabled, receive the message quota configured
in this option.
The default of -1 disables assigning message quota.
For consistency with autocreate_quota, a value of zero is treated
as unlimited message quota, rather than a message quota of zero.
autocreate_sieve_folders: <none>
A "|" separated list of subfolders of INBOX that will be
automatically created, if requested by a sieve filter, through the
"fileinto" action. The default is to create no folders
automatically.
Leading and trailing whitespace is stripped from each folder, so a
setting of "Junk | Trash" will create two folders: "Junk" and
"Trash".
autocreate_sieve_script: <none>
The full path of a file that contains a sieve script. This script
automatically becomes a user's initial default sieve filter
script.
When this option is not defined, no default sieve filter is
created. The file must be readable by the Cyrus daemon.
autocreate_sieve_script_compile: 0
If set to yes and no compiled sieve script file exists, the sieve
script which is compiled on the fly will be saved in the file name
that autocreate_sieve_compiledscript option points to. In order a
compiled script to be generated, autocreate_sieve_script and
autocreate_sieve_compiledscript must have valid values
autocreate_sieve_script_compiled: <none>
The full path of a file that contains a compiled in bytecode sieve
script. This script automatically becomes a user's initial default
sieve filter script. If this option is not specified, or the
filename doesn't exist then the script defined by
autocreate_sieve_script is compiled on the fly and installed as
the user's default sieve script
autocreate_subscribe_folders: <none>
A list of folder names, separated by "|", that the users get
automatically subscribed to, when their INBOX is created. These
folder names must have been included in the autocreateinboxfolders
option of the imapd.conf.
autocreate_subscribe_sharedfolders: <none>
A list of shared folders (bulletin boards), separated by "|", that
the users get automatically subscribed to, after their INBOX is
created. The shared folder must have been created and the user
must have the required permissions to get subscribed to it.
Otherwise, subscribing to the shared folder fails.
autocreate_subscribe_sharedfolders_all: 0
If set to yes, the user is automatically subscribed to all shared
folders, one has permission to subscribe to.
autocreate_users: anyone
A space separated list of users and/or groups that are allowed
their INBOX to be automatically created.
berkeley_cachesize: 512
Size (in kilobytes) of the shared memory buffer pool (cache) used
by the berkeley environment. The minimum allowed value is 20.
The maximum allowed value is 4194303 (4GB).
berkeley_locks_max: 50000
Maximum number of locks to be held or requested in the berkeley
environment.
berkeley_txns_max: 100
Maximum number of transactions to be supported in the berkeley
environment.
boundary_limit: 1000
messages are parsed recursively and a deep enough MIME structure
can cause a stack overflow. Do not parse deeper than this many
layers of MIME structure. The default of 1000 is much higher than
any sane message should have.
caldav_allowscheduling: on
Enable calendar scheduling operations. If set to "apple", the
server will emulate Apple CalendarServer behavior as closely as
possible.
Allowed values: off, on, apple
caldav_maxdatetime: 20380119T031407Z
The latest date and time accepted by the server (ISO format).
This value is also used for expanding non-terminating recurrence
rules.
Note that increasing this value will require the DAV databases for
calendars to be reconstructed with the dav_reconstruct utility in
order to see its effect on serer-side time-based queries.
caldav_mindatetime: 19011213T204552Z
The earliest date and time accepted by the server (ISO format).
caldav_realm: <none>
The realm to present for HTTP authentication of CalDAV resources.
If not set (the default), the value of the "servername" option
will be used.
calendarprefix: #calendars
The prefix for the calendar mailboxes hierarchies. The hierarchy
delimiter will be automatically appended. The public calendar
hierarchy will be at the toplevel of the shared namespace. A
user's personal calendar hierarchy will be a child of their Inbox.
calendar_user_address_set: <none>
Space-separated list of domains corresponding to calendar user
addresses for which the server is responsible. If not set (the
default), the value of the "servername" option will be used.
carddav_realm: <none>
The realm to present for HTTP authentication of CardDAV resources.
If not set (the default), the value of the "servername" option
will be used.
chatty: 0
If yes, syslog tags and commands for every IMAP command, mailboxes
for every lmtp connection, every POP3 command, etc
client_timeout: 10
Number of seconds to wait before returning a timeout failure when
performing a client connection (e.g., in a murder environment)
commandmintimer: <none>
Time in seconds. Any imap command that takes longer than this time
is logged.
configdirectory: <none>
The pathname of the IMAP configuration directory. This field is
required.
createonpost: 0
Deprecated in favor of autocreate_post.
dav_realm: <none>
The realm to present for HTTP authentication of generic DAV
resources (principals). If not set (the default), the value of
the "servername" option will be used.
debug_command: <none>
Debug command to be used by processes started with -D option. The
string is a C format string that gets 3 options: the first is the
name of the executable (without path). The second is the pid
(integer) and the third is the service ID. Example:
/usr/local/bin/gdb /usr/cyrus/bin/%s %d
defaultacl: anyone lrs
The Access Control List (ACL) placed on a newly-created (non-user)
mailbox that does not have a parent mailbox.
defaultdomain: <none>
The default domain for virtual domain support. Note that this
domain is stripped from the email-address transmitted using LMTP,
but it is not stripped from usernames at login-time. For
imapd/pop3d, "user" and "user@defaultdomain" specify two different
users. Please check install-virtdomains.html for details.
defaultpartition: <none>
The partition name used by default for new mailboxes. If not
specified, the partition with the most free space will be used for
new mailboxes.
Note that the partition specified by this option must also be
specified as partition-name, where you substitute 'name' for the
alphanumeric string you set defaultpartition to.
defaultserver: <none>
The backend server name used by default for new mailboxes. If not
specified, the server with the most free space will be used for
new mailboxes.
deletedprefix: DELETED
If "delete_mode" set to be "delayed", the prefix for the deleted
mailboxes hierarchy. The hierarchy delimiter will be
automatically appended.
delete_mode: delayed
The manner in which mailboxes are deleted. "immediate" mode is the
default behavior in which mailboxes are removed immediately. In
"delayed" mode, mailboxes are renamed to a special hiearchy
defined by the "deletedprefix" option to be removed later by
cyr_expire.
Allowed values: immediate, delayed
deleteright: c
Deprecated - only used for backwards compatibility with existing
installations. Lists the old RFC 2086 right which was used to
grant the user the ability to delete a mailbox. If a user has
this right, they will automatically be given the new 'x' right.
disable_user_namespace: 0
Preclude list command on user namespace. If set to 'yes', the
LIST response will never include any other user's mailbox. Admin
users will always see all mailboxes. The default is 'no'
disable_shared_namespace: 0
Preclude list command on shared namespace. If set to 'yes', the
LIST response will never include any non-user mailboxes. Admin
users will always see all mailboxes. The default is 'no'
disconnect_on_vanished_mailbox: 0
If enabled, IMAP/POP3/NNTP clients will be disconnected by the
server if the currently selected mailbox is (re)moved by another
session. Otherwise, the missing mailbox is treated as empty while
in use by the client.
ischedule_dkim_domain: <none>
The domain to be reported as doing iSchedule DKIM signing.
ischedule_dkim_key_file: <none>
File containing the private key for iSchedule DKIM signing.
ischedule_dkim_selector: <none>
Name of the selector subdividing the domain namespace. This
specifies the actual key used for iSchedule DKIM signing within
the domain.
duplicate_db: twoskip
The cyrusdb backend to use for the duplicate delivery suppression
and sieve.
Allowed values: berkeley, berkeley-nosync, berkeley-hash,
berkeley-hash-nosync, skiplist, sql, twoskip
duplicate_db_path: <none>
The absolute path to the duplicate db file. If not specified,
will be confdir/deliver.db
duplicatesuppression: 1
If enabled, lmtpd will suppress delivery of a message to a mailbox
if a message with the same message-id (or resent-message-id) is
recorded as having already been delivered to the mailbox. Records
the mailbox and message-id/resent-message-id of all successful
deliveries.
event_content_inclusion_mode: standard
The mode in which message content may be included with
MessageAppend and MessageNew. "standard" mode is the default
behavior in which message is included up to a size with the
notification. In "message" mode, the message is included and may
be truncated to a size. In "header" mode, it includes headers
truncated to a size. In "body" mode, it includes body truncated to
a size. In "headerbody" mode, it includes full headers and body
truncated to a size
Allowed values: standard, message, header, body, headerbody
event_content_size: 0
Truncate the message content that may be included with
MessageAppend and MessageNew. Set 0 to include the entire message
itself
event_exclude_flags: <none>
Don't send event notification for given IMAP flag(s)
event_exclude_specialuse: Junk
Don't send event notification for folder with given special-use
attributes. Set ALL for any folder
event_extra_params: timestamp
Space-separated list of extra parameters to add to any
appropriated event.
Allowed values: bodyStructure, clientAddress, diskUsed, flagNames,
messageContent, messageSize, messages, modseq, service, timestamp,
uidnext, vnd.cmu.midset, vnd.cmu.unseenMessages, vnd.cmu.envelope,
vnd.cmu.sessionId, vnd.cmu.mbtype, vnd.cmu.davFilename,
vnd.cmu.davUid
event_groups: message mailbox
Space-separated list of groups of related events to turn on
notification
Allowed values: message, quota, flags, access, mailbox,
subscription
event_notifier: <none>
Notifyd(8) method to use for "EVENT" notifications which are based
on the RFC 5423. If not set, "EVENT" notifications are disabled.
expunge_mode: delayed
The mode in which messages (and their corresponding cache entries)
are expunged. "default" mode is the default behavior in which the
message files are purged at the time of the EXPUNGE, but index and
cache records are retained to facilitate QRESYNC. In "delayed"
mode, the message files are also retained, allowing unexpunge to
rescue them. In "immediate" mode, both the message files and the
index records are removed as soon as possible. In all cases,
nothing will be finally purged until all other processes have
closed the mailbox to ensure they never see data disappear under
them. In "default" or "delayed" mode, a later run of "cyr_expire"
will clean out the retained records (and possibly message files).
This reduces the amount of I/O that takes place at the time of
EXPUNGE and should result in greater responsiveness for the
client, especially when expunging a large number of messages.
Allowed values: default, immediate, delayed
failedloginpause: 3
Number of seconds to pause after a failed login.
flushseenstate: 1
Deprecated. No longer used
foolstupidclients: 0
If enabled, only list the personal namespace when a LIST "*" is
performed (it changes the request to a LIST "INBOX*").
force_sasl_client_mech: <none>
Force preference of a given SASL mechanism for client side
operations (e.g., murder environments). This is separate from
(and overridden by) the ability to use the <host shortname>_mechs
option to set preferred mechanisms for a specific host
fulldirhash: 0
If enabled, uses an improved directory hashing scheme which hashes
on the entire username instead of using just the first letter as
the hash. This changes hash algorithm used for quota and user
directories and if hashimapspool is enabled, the entire mail
spool.
Note that this option CANNOT be changed on a live system. The
server must be quiesced and then the directories moved with the
rehash utility.
hashimapspool: 0
If enabled, the partitions will also be hashed, in addition to the
hashing done on configuration directories. This is recommended if
one partition has a very bushy mailbox tree.
debug: 0
If enabled, allow syslog() to pass LOG_DEBUG messages.
hostname_mechs: <none>
Force a particular list of SASL mechanisms to be used when
authenticating to the backend server hostname (where hostname is
the short hostname of the server in question). If it is not
specified it will query the server for available mechanisms and
pick one to use. - Cyrus Murder
hostname_password: <none>
The password to use for authentication to the backend server
hostname (where hostname is the short hostname of the server) -
Cyrus Murder
httpallowcompress: 1
If enabled, the server will compress response payloads if the
client indicates that it can accept them. Note that the
compressed data will appear in telemetry logs, leaving only the
response headers as human-readable.
httpallowcors: <none>
A wildmat pattern specifying a list of origin URIs ( scheme "://"
host [ ":" port ] ) that are allowed to make Cross-Origin Resource
Sharing (CORS) requests on the server. By default, CORS requests
are disabled.
Note that the scheme and host should both be lowercase, the port
should be omitted if using the default for the scheme (80 for
http, 443 for https), and there should be no trailing '/' (e.g.:
"http://www.example.com:8080", "https://example.org").
httpallowtrace: 0
Allow use of the TRACE method.
Note that sensitive data might be disclosed by the response.
httpallowedurls: <none>
Space-separated list of relative URLs (paths) rooted at
"httpdocroot" (see below) to be served by httpd. If set, this
option will limit served static content to only those paths
specified (returning "404 Not Found" to any other client requested
URLs). Otherwise, httpd will serve any content found in
"httpdocroot".
Note that any path specified by "rss_feedlist_template" is an
exception to this rule.
httpcontentmd5: 0
If enabled, HTTP responses will include a Content-MD5 header for
the purpose of providing an end-to-end message integrity check
(MIC) of the payload body. Note that enabling this option will
use additional CPU to generate the MD5 digest, which may be
ignored by clients anyways.
httpdocroot: <none>
If set, http will serve the static content (html/text/jpeg/gif
files, etc) rooted at this directory. Otherwise, httpd will not
serve any static content.
httpkeepalive: 20
Set the length of the HTTP server's keepalive heartbeat in
seconds. The default is 20. The minimum value is 0, which will
disable the keepalive heartbeat. When enabled, if a request takes
longer than httpkeepalive seconds to process, the server will send
the client provisional responses every httpkeepalive seconds until
the final response can be sent
httpmodules: <empty string>
Space-separated list of HTTP modules that will be enabled in
httpd(8). This option has no effect on modules that are disabled
at compile time due to missing dependencies (e.g. libical).
Allowed values: caldav, carddav, domainkey, ischedule, rss,
timezone
httpprettytelemetry: 0
If enabled, HTTP response payloads including server-generated
markup languages (HTML, XML) will utilize line breaks and
indentation to promote better human-readability in telemetry logs.
Note that enabling this option will increase the amount of data
sent across the wire.
httptimeout: 5
Set the length of the HTTP server's inactivity autologout timer,
in minutes. The default is 5. The minimum value is 0, which will
disable persistent connections.
idlesocket: {configdirectory}/socket/idle
Unix domain socket that idled listens on.
ignorereference: 0
For backwards compatibility with Cyrus 1.5.10 and earlier --
ignore the reference argument in LIST or LSUB commands.
imapidlepoll: 60
The interval (in seconds) for polling for mailbox changes and
ALERTs while running the IDLE command. This option is used when
idled is not enabled or cannot be contacted. The minimum value is
1. A value of 0 will disable IDLE.
imapidresponse: 1
If enabled, the server responds to an ID command with a parameter
list containing: version, vendor, support-url, os, os-version,
command, arguments, environment. Otherwise the server returns
NIL.
imapmagicplus: 0
Only list a restricted set of mailboxes via IMAP by using
userid+namespace syntax as the authentication/authorization id.
Using userid+ (with an empty namespace) will list only subscribed
mailboxes.
implicit_owner_rights: lkxa
The implicit Access Control List (ACL) for the owner of a mailbox.
@include: <none>
Directive which includes the specified file as part of the
configuration. If the path to the file is not absolute,
CYRUS_PATH is prepended.
improved_mboxlist_sort: 0
If enabled, a special comparator will be used which will correctly
sort mailbox names that contain characters such as ' ' and '-'.
Note that this option SHOULD NOT be changed on a live system. The
mailboxes database should be dumped (ctl_mboxlist) before the
option is changed, removed, and then undumped after changing the
option. When not using flat files for the subscriptions databases
the same has to be done (cyr_dbtool) for each subscription
database See improved_mboxlist_sort.html.
internaldate_heuristic: standard
Mechanism to determine email internaldates on
delivery/reconstruct. "standard" uses time() when delivering a
message, mtime on reconstruct. "receivedheader" looks at the top
most Received header or time/mtime otherwise
Allowed values: standard, receivedheader
iolog: 0
Should cyrus output I/O log entries
ldap_authz: <none>
SASL authorization ID for the LDAP server
ldap_base: <empty string>
Contains the LDAP base dn for the LDAP ptloader module
ldap_bind_dn: <none>
Bind DN for the connection to the LDAP server (simple bind). Do
not use for anonymous simple binds
ldap_deref: never
Specify how aliases dereferencing is handled during search.
Allowed values: search, find, always, never
ldap_domain_base_dn: <empty string>
Base DN to search for domain name spaces.
ldap_domain_filter:
(&(objectclass=domainrelatedobject)(associateddomain=%s))
Filter to use searching for domains
ldap_domain_name_attribute: associateddomain
The attribute name for domains.
ldap_domain_scope: sub
Search scope
Allowed values: sub, one, base
ldap_domain_result_attribute: inetdomainbasedn
Result attribute
ldap_filter: (uid=%u)
Specify a filter that searches user identifiers. The following
tokens can be used in the filter string:
%% = % %u = user %U = user portion of %u (%U = test when %u
= test@domain.tld) %d = domain portion of %u if available (%d =
domain.tld when %u = %test@domain.tld), otherwise same as %r %D
= user dn. (use when ldap_member_method: filter) %1-9 = domain
tokens (%1 = tld, %2 = domain when %d = domain.tld)
ldap_filter is not used when ldap_sasl is enabled.
ldap_group_base: <empty string>
LDAP base dn for ldap_group_filter.
ldap_group_filter: (cn=%u)
Specify a filter that searches for group identifiers. See
ldap_filter for more options.
ldap_group_scope: sub
Specify search scope for ldap_group_filter.
Allowed values: sub, one, base
ldap_id: <none>
SASL authentication ID for the LDAP server
ldap_mech: <none>
SASL mechanism for LDAP authentication
ldap_user_attribute: <none>
Specify LDAP attribute to use as canonical user id
ldap_member_attribute: <none>
See ldap_member_method.
ldap_member_base: <empty string>
LDAP base dn for ldap_member_filter.
ldap_member_filter: (member=%D)
Specify a filter for "ldap_member_method: filter". See
ldap_filter for more options.
ldap_member_method: attribute
Specify a group method. The "attribute" method retrieves groups
from a multi-valued attribute specified in ldap_member_attribute.
The "filter" method uses a filter, specified by
ldap_member_filter, to find groups; ldap_member_attribute is a
single-value attribute group name.
Allowed values: attribute, filter
ldap_member_scope: sub
Specify search scope for ldap_member_filter.
Allowed values: sub, one, base
ldap_password: <none>
Password for the connection to the LDAP server (SASL and simple
bind). Do not use for anonymous simple binds
ldap_realm: <none>
SASL realm for LDAP authentication
ldap_referrals: 0
Specify whether or not the client should follow referrals.
ldap_restart: 1
Specify whether or not LDAP I/O operations are automatically
restarted if they abort prematurely.
ldap_sasl: 1
Use SASL for LDAP binds in the LDAP PTS module.
ldap_sasl_authc: <none>
Deprecated. Use ldap_id
ldap_sasl_authz: <none>
Deprecated. Use ldap_authz
ldap_sasl_mech: <none>
Deprecated. Use ldap_mech
ldap_sasl_password: <none>
Deprecated. User ldap_password
ldap_sasl_realm: <none>
Deprecated. Use ldap_realm
ldap_scope: sub
Specify search scope.
Allowed values: sub, one, base
ldap_servers: ldap://localhost/
Deprecated. Use ldap_uri
ldap_size_limit: 1
Specify a number of entries for a search request to return.
ldap_start_tls: 0
Use transport layer security for ldap:// using STARTTLS. Do not
use ldaps:// in 'ldap_uri' with this option enabled.
ldap_time_limit: 5
Specify a number of seconds for a search request to complete.
ldap_timeout: 5
Specify a number of seconds a search can take before timing out.
ldap_ca_dir: <none>
Path to a directory with CA (Certificate Authority) certificates.
ldap_ca_file: <none>
Patch to a file containing CA (Certificate Authority)
certificate(s).
ldap_client_cert: <none>
File containing the client certificate.
ldap_verify_peer: 0
Require and verify server certificate. If this option is yes, you
must specify ldap_ca_file or ldap_ca_dir.
ldap_ciphers: <none>
List of SSL/TLS ciphers to allow. The format of the string is
described in ciphers(1).
ldap_client_key: <none>
File containing the private client key.
ldap_tls_cacert_dir: <none>
Deprecated in favor of ldap_ca_dir.
ldap_tls_cacert_file: <none>
Deprecated in favor of ldap_ca_file.
ldap_tls_cert: <none>
Deprecated in favor of ldap_client_cert.
ldap_tls_key: <none>
Deprecated in favor of ldap_client_key.
ldap_tls_check_peer: <none>
Deprecated in favor of ldap_verify_peer.
ldap_tls_ciphers: <none>
Deprecated in favor of ldap_ciphers.
ldap_uri: <none>
Contains a list of the URLs of all the LDAP servers when using the
LDAP PTS module.
ldap_version: 3
Specify the LDAP protocol version. If ldap_start_tls and/or
ldap_use_sasl are enabled, ldap_version will be automatically set
to 3.
lmtp_downcase_rcpt: 1
If enabled, lmtpd will convert the recipient addresses to
lowercase (up to a '+' character, if present).
lmtp_fuzzy_mailbox_match: 0
If enabled, and the mailbox specified in the detail part of the
recipient (everything after the '+') does not exist, lmtpd will
try to find the closest match (ignoring case, ignoring whitespace,
falling back to parent) to the specified mailbox name.
lmtp_over_quota_perm_failure: 0
If enabled, lmtpd returns a permanent failure code when a user's
mailbox is over quota. By default, the failure is temporary,
causing the MTA to queue the message and retry later.
lmtp_strict_quota: 0
If enabled, lmtpd returns a failure code when the incoming message
will cause the user's mailbox to exceed its quota. By default,
the failure won't occur until the mailbox is already over quota.
lmtp_strict_rfc2821: 1
By default, lmtpd will be strict (per RFC 2821) with regards to
which envelope addresses are allowed. If this option is set to
false, 8bit characters in the local-part of envelope addresses are
changed to 'X' instead. This is useful to avoid generating
backscatter with certain MTAs like Postfix or Exim which accept
such messages.
lmtpsocket: {configdirectory}/socket/lmtp
Unix domain socket that lmtpd listens on, used by deliver(8). This
should match the path specified in cyrus.conf(5).
lmtptxn_timeout: 300
Timeout (in seconds) used during a lmtp transaction to a remote
backend (e.g. in a murder environment). Can be used to prevent
hung lmtpds on proxy hosts when a backend server becomes
unresponsive during a lmtp transaction. The default is 300 -
change to zero for infinite.
loginrealms: <empty string>
The list of remote realms whose users may authenticate using
cross-realm authentication identifiers. Separate each realm name
by a space. (A cross-realm identity is considered any identity
returned by SASL with an "@" in it.) Note that to support multiple
virtual domains on the same interface/IP, you need to list them
all as loginreals. If you don't list them here, your users
probably won't be able to log in.
loginuseacl: 0
If enabled, any authentication identity which has a rights on a
user's INBOX may log in as that user.
logtimestamps: 0
Include notations in the protocol telemetry logs indicating the
number of seconds since the last command or response.
mailbox_default_options: 0
Default "options" field for the mailbox on create. You'll want to
know what you're doing before setting this, but it can apply some
default annotations like duplicate supression
mailbox_initial_flags: <none>
space-separated list of permanent flags which will be pre-set in
every newly created mailbox. If you know you will require
particular flag names then this avoids a possible race condition
against a client that fills the entire 128 available slots.
Default is NULL, which is no flags. Example: $Label1 $Label2
$Label3 NotSpam Spam
mailnotifier: <none>
Notifyd(8) method to use for "MAIL" notifications. If not set,
"MAIL" notifications are disabled.
maxheaderlines: 1000
Maximum number of lines of header that will be processed into
cache records. Default 1000. If set to zero, it is unlimited.
If a message hits the limit, an error will be logged and the rest
of the lines in the header will be skipped. This is to avoid
malformed messages causing giant cache records
maxlogins_per_host: 0
Maximum number of logged in sessions allowed per host, zero means
no limit
maxlogins_per_user: 0
Maximum number of logged in sessions allowed per user, zero means
no limit
maxmessagesize: 0
Maximum incoming LMTP message size. If non-zero, lmtpd will
reject messages larger than maxmessagesize bytes. If set to 0,
this will allow messages of any size (the default).
maxquoted: 131072
Maximum size of a single quoted string for the parser. Default
128k
maxword: 131072
Maximum size of a single word for the parser. Default 128k
mboxkey_db: twoskip
The cyrusdb backend to use for mailbox keys.
Allowed values: berkeley, skiplist, twoskip
mboxlist_db: twoskip
The cyrusdb backend to use for the mailbox list.
Allowed values: flat, berkeley, berkeley-hash, skiplist, sql,
twoskip
mboxlist_db_path: <none>
The absolute path to the mailboxes db file. If not specified will
be confdir/mailboxes.db
mboxname_lockpath: <none>
Path to mailbox name lock files (default $conf/lock)
metapartition_files: <empty string>
Space-separated list of metadata files to be stored on a
metapartition rather than in the mailbox directory on a spool
partition.
Allowed values: header, index, cache, expunge, squat, annotations,
lock, dav
metapartition-name: <none>
The pathname of the metadata partition name, corresponding to
spool partition partition-name. For any mailbox residing in a
directory on partition-name, the metadata files listed in
metapartition_files will be stored in a corresponding directory on
metapartition-name. Note that not every partition-name option is
required to have a corresponding metapartition-name option, so
that you can selectively choose which spool partitions will have
separate metadata partitions.
mupdate_authname: <none>
The SASL username (Authentication Name) to use when authenticating
to the mupdate server (if needed).
mupdate_config: standard
The configuration of the mupdate servers in the Cyrus Murder. The
"standard" config is one in which there are discreet frontend
(proxy) and backend servers. The "unified" config is one in which
a server can be both a frontend and backend. The "replicated"
config is one in which multiple backend servers all share the same
mailspool, but each have their own "replicated" copy of
mailboxes.db.
Allowed values: standard, unified, replicated
munge8bit: 1
If enabled, lmtpd munges messages with 8-bit characters in the
headers. The 8-bit characters are changed to `X'. If reject8bit
is enabled, setting munge8bit has no effect. (A proper solution
to non-ASCII characters in headers is offered by RFC 2047 and its
predecessors.)
mupdate_connections_max: 128
The max number of connections that a mupdate process will allow,
this is related to the number of file descriptors in the mupdate
process. Beyond this number connections will be immediately
issued a BYE response.
mupdate_password: <none>
The SASL password (if needed) to use when authenticating to the
mupdate server.
mupdate_port: 3905
The port of the mupdate server for the Cyrus Murder
mupdate_realm: <none>
The SASL realm (if needed) to use when authenticating to the
mupdate server.
mupdate_retry_delay: 20
The base time to wait between connection retries to the mupdate
server.
mupdate_server: <none>
The mupdate server for the Cyrus Murder
mupdate_username: <empty string>
The SASL username (Authorization Name) to use when authenticating
to the mupdate server
mupdate_workers_max: 50
The maximum number of mupdate worker threads (overall)
mupdate_workers_maxspare: 10
The maximum number of idle mupdate worker threads
mupdate_workers_minspare: 2
The minimum number of idle mupdate worker threads
mupdate_workers_start: 5
The number of mupdate worker threads to start
netscapeurl: <none>
If enabled at compile time, this specifies a URL to reply when
Netscape asks the server where the mail administration HTTP server
is. Administrators should set this to a local resource.
newsaddheaders: to
Space-separated list of headers to be added to incoming usenet
articles. Added To: headers will contain email delivery addresses
corresponding to each newsgroup in the Newsgroups: header. Added
Reply-To: headers will contain email delivery addresses
corresponding to each newsgroup in the Followup-To: or Newsgroups:
header. If the specified header(s) already exist in an article,
the email delivery addresses will be appended to the original
header body(s).
This option applies if and only if the newspostuser option is set.
Allowed values: to, replyto
newsgroups: *
A wildmat pattern specifying which mailbox hierarchies should be
treated as newsgroups. Only mailboxes matching the wildmat will
accept and/or serve articles via NNTP. If not set, a default
wildmat of "*" (ALL shared mailboxes) will be used. If the
newsprefix option is also set, the default wildmat will be
translated to "<newsprefix>.*"
newsmaster: news
Userid that is used for checking access controls when executing
Usenet control messages. For instance, to allow articles to be
automatically deleted by cancel messages, give the "news" user the
'd' right on the desired mailboxes. To allow newsgroups to be
automatically created, deleted and renamed by the corresponding
control messages, give the "news" user the 'c' right on the
desired mailbox hierarchies.
newspeer: <none>
A list of whitespace-separated news server specifications to which
articles should be fed. Each server specification is a string of
the form [user[:pass]@]host[:port][/wildmat] where 'host' is the
fully qualified hostname of the server, 'port' is the port on
which the server is listening, 'user' and 'pass' are the
authentication credentials and 'wildmat' is a pattern that
specifies which groups should be fed. If no 'port' is specified,
port 119 is used. If no 'wildmat' is specified, all groups are
fed. If 'user' is specified (even if empty), then the NNTP POST
command will be used to feed the article to the server, otherwise
the IHAVE command will be used.
A '@' may be used in place of '!' in the wildmat to prevent
feeding articles cross-posted to the given group, otherwise cross-
posted articles are fed if any part of the wildmat matches. For
example, the string "peer.example.com:*,!control.*,@local.*" would
feed all groups except control messages and local groups to
peer.example.com. In the case of cross-posting to local groups,
these articles would not be fed.
newspostuser: <none>
Userid used to deliver usenet articles to newsgroup folders
(usually via lmtp2nntp). For example, if set to "post", email
sent to "post+comp.mail.imap" would be delivered to the
"comp.mail.imap" folder.
When set, the Cyrus NNTP server will add the header(s) specified
in the newsaddheaders option to each incoming usenet article. The
added header(s) will contain email delivery addresses
corresponding to each relevent newsgroup. If not set, no headers
are added to usenet articles.
newsprefix: <none>
Prefix to be prepended to newsgroup names to make the
corresponding IMAP mailbox names.
newsrc_db_path: <none>
The absolute path to the newsrc db file. If not specified, will
be confdir/fetchnews.db
nntptimeout: 3
Set the length of the NNTP server's inactivity autologout timer,
in minutes. The minimum value is 3, the default.
notifysocket: {configdirectory}/socket/notify
Unix domain socket that the mail notification daemon listens on.
notify_external: <none>
Path to the external program that notifyd(8) will call to send
mail notifications.
The external program will be called with the following command
line options:
-c class
-p priority
-u user
-m mailbox
And the notification message will be available on stdin.
partition-name: <none>
The pathname of the partition name. At least one partition
pathname MUST be specified. If the defaultpartition option is
used, then its pathname MUST be specified. For example, if the
value of the defaultpartion option is default, then the partition-
default field is required.
partition_select_mode: freespace-most
Partition selection mode.
random
(pseudo-)random selection
freespace-most
partition with the most free space (KiB)
freespace-percent-most
partition with the most free space (%)
freespace-percent-weighted
each partition is weighted according to its free space (%);
the more free space the partition has, the more chances it
has to be selected
freespace-percent-weighted-delta
each partition is weighted according to its difference of
free space (%) compared to the most used partition; the more
the partition is lagging behind the most used partition, the
more chances it has to be selected
Note that actually even the most used partition has a few chances
to be selected, and those chances increase when other partitions
get closer
Allowed values: random, freespace-most, freespace-percent-most,
freespace-percent-weighted, freespace-percent-weighted-delta
partition_select_exclude: <none>
List of partitions to exclude from selection mode.
partition_select_usage_reinit: 0
For a given session, number of operations (e.g. partition
selection) for which partitions usage data are cached.
partition_select_soft_usage_limit: 0
Limit of partition usage (%): if a partition is over that limit,
it is automatically excluded from selection mode.
If all partitions are over that limit, this feature is not used
anymore.
plaintextloginpause: 0
Number of seconds to pause after a successful plaintext login.
For systems that support strong authentication, this permits users
to perceive a cost of using plaintext passwords. (This does not
affect the use of PLAIN in SASL authentications.)
plaintextloginalert: <none>
Message to send to client after a successful plaintext login.
popexpiretime: -1
The number of days advertised as being the minimum a message may
be left on the POP server before it is deleted (via the CAPA
command, defined in the POP3 Extension Mechanism, which some
clients may support). "NEVER", the default, may be specified with
a negative number. The Cyrus POP3 server never deletes mail, no
matter what the value of this parameter is. However, if a site
implements a less liberal policy, it needs to change this
parameter accordingly.
popminpoll: 0
Set the minimum amount of time the server forces users to wait
between successive POP logins, in minutes.
popsubfolders: 0
Allow access to subfolders of INBOX via POP3 by using
userid+subfolder syntax as the authentication/authorization id.
poppollpadding: 1
Create a softer minimum poll restriction. Allows poppollpadding
connections before the minpoll restriction is triggered.
Additionally, one padding entry is recovered every popminpoll
minutes. This allows for the occasional polling rate faster than
popminpoll, (i.e., for clients that require a send/receive to send
mail) but still enforces the rate long-term. Default is 1
(disabled).
The easiest way to think of it is a queue of past connections,
with one slot being filled for every connection, and one slot
being cleared every popminpoll minutes. When the queue is full,
the user will not be able to check mail again until a slot is
cleared. If the user waits a sufficient amount of time, they will
get back many or all of the slots.
poptimeout: 10
Set the length of the POP server's inactivity autologout timer, in
minutes. The minimum value is 10, the default.
popuseacl: 0
Enforce IMAP ACLs in the pop server. Due to the nature of the
POP3 protocol, the only rights which are used by the pop server
are 'r', user to open the mailbox and list/retrieve messages. The
't' right allows the user to delete messages. The 's' right
allows messages retrieved by the user to have the \Seen flag set
(only if popuseimapflags is also enabled).
popuseimapflags: 0
If enabled, the pop server will set and obey IMAP flags. Messages
having the \Deleted flag are ignored as if they do not exist.
Messages that are retrieved by the client will have the \Seen flag
set. All messages will have the \Recent flag unset.
postmaster: postmaster
Username that is used as the 'From' address in rejection MDNs
produced by sieve.
postuser: <empty string>
Userid used to deliver messages to shared folders. For example,
if set to "bb", email sent to "bb+shared.blah" would be delivered
to the "shared.blah" folder. By default, an email address of
"+shared.blah" would be used.
proc_path: <none>
Path to proc directory. Default is NULL - must be an absolute
path if specified. If not specified, the path $confdir/proc/ will
be used.
proxy_authname: proxy
The authentication name to use when authenticating to a backend
server in the Cyrus Murder.
proxy_compress: 0
Try to enable protocol-specific compression when performing a
client connection to a backend server in the Cyrus Murder.
Note that this should only be necessary over slow network
connections. Also note that currently only IMAP and MUPDATE
support compression.
proxy_password: <none>
The default password to use when authenticating to a backend
server in the Cyrus Murder. May be overridden on a host-specific
basis using the hostname_password option.
proxy_realm: <none>
The authentication realm to use when authenticating to a backend
server in the Cyrus Murder
proxyd_allow_status_referral: 0
Set to true to allow proxyd to issue referrals to clients that
support it when answering the STATUS command. This is disabled by
default since some clients issue many STATUS commands in a row,
and do not cache the connections that these referrals would cause,
thus resulting in a higher authentication load on the respective
backend server.
proxyd_disable_mailbox_referrals: 0
Set to true to disable the use of mailbox-referrals on the proxy
servers.
proxyservers: <none>
A list of users and groups that are allowed to proxy for other
users, separated by spaces. Any user listed in this will be
allowed to login for any other user: use with caution. In a
standard murder this option should ONLY be set on backends. DO
NOT SET on frontends or things won't work properly.
pts_module: afskrb
The PTS module to use.
Allowed values: afskrb, ldap
ptloader_sock: <none>
Unix domain socket that ptloader listens on. (defaults to
configdir/ptclient/ptsock)
ptscache_db: twoskip
The cyrusdb backend to use for the pts cache.
Allowed values: berkeley, berkeley-hash, skiplist, twoskip
ptscache_db_path: <none>
The absolute path to the ptscache db file. If not specified, will
be confdir/ptscache.db
ptscache_timeout: 10800
The timeout (in seconds) for the PTS cache database when using the
auth_krb_pts authorization method (default: 3 hours).
ptskrb5_convert524: 1
When using the AFSKRB ptloader module with Kerberos 5
canonicalization, do the final 524 conversion to get a n AFS style
name (using '.' instead of '/', and using short names
ptskrb5_strip_default_realm: 1
When using the AFSKRB ptloader module with Kerberos 5
canonicalization, strip the default realm from the userid (this
does not affect the stripping of realms specified by the
afspts_localrealms option)
qosmarking: cs0
This specifies the Class Selector or Differentiated Services Code
Point designation on IP headers (in the ToS field).
Allowed values: cs0, cs1, cs2, cs3, cs4, cs5, cs6, cs7, af11,
af12, af13, af21, af22, af23, af31, af32, af33, af41, af42, af43,
ef
quota_db: quotalegacy
The cyrusdb backend to use for quotas.
Allowed values: flat, berkeley, berkeley-hash, skiplist, sql,
quotalegacy, twoskip
quota_db_path: <none>
The absolute path for the quota database (if you choose a single-
file quota DB type - or the base path if you choose quotalegacy).
If not specified will be confdir/quota.db or confdir/quota/
quotawarn: 90
The percent of quota utilization over which the server generates
warnings.
quotawarnkb: 0
The maximum amount of free space (in kB) at which to give a quota
warning (if this value is 0, or if the quota is smaller than this
amount, then warnings are always given).
quotawarnmsg: 0
The maximum amount of messages at which to give a quota warning
(if this value is 0, or if the quota is smaller than this amount,
then warnings are always given).
reject8bit: 0
If enabled, lmtpd rejects messages with 8-bit characters in the
headers.
rfc2046_strict: 0
If enabled, imapd will be strict (per RFC 2046) when matching MIME
boundary strings. This means that boundaries containing other
boundaries as substrings will be treated as identical. Since
enabling this option will break some messages created by Eudora
5.1 (and earlier), it is recommended that it be left disabled
unless there is good reason to do otherwise.
rfc3028_strict: 1
If enabled, Sieve will be strict (per RFC 3028) with regards to
which headers are allowed to be used in address and envelope
tests. This means that only those headers which are defined to
contain addresses will be allowed in address tests and only "to"
and "from" will be allowed in envelope tests. When disabled, ANY
grammatically correct header will be allowed.
rss_feedlist_template: <none>
File containing HTML that will be used as a template for
displaying the list of available RSS feeds. A single instance of
the variable %RSS_FEEDLIST% should appear in the file, which will
be replaced by a nested unordered list of feeds. The toplevel
unordered list will be tagged with an id of "feed" (<ul
id='feed'>) which can be used by stylesheet(s) in your template.
The dynamically created list of feeds based on the HTML template
will be accessible at the "/rss" URL on the server.
rss_feeds: *
A wildmat pattern specifying which mailbox hierarchies should be
treated as RSS feeds. Only mailboxes matching the wildmat will
have their messages available via RSS. If not set, a default
wildmat of "*" (ALL mailboxes) will be used.
rss_maxage: 0
Maximum age (in days) of items to display in an RSS channel. If
non-zero, httpd will only display items received within the last
rss_maxage days. If set to 0, all available items will be
displayed (the default).
rss_maxitems: 0
Maximum number of items to display in an RSS channel. If non-
zero, httpd will display no more than the rss_maxitems most recent
items. If set to 0, all available items will be displayed (the
default).
rss_maxsynopsis: 0
Maximum RSS item synopsis length. If non-zero, httpd will display
no more than the first rss_maxsynopsis characters of an item's
synopsis. If set to 0, the entire synopsis will be displayed (the
default).
rss_realm: <none>
The realm to present for HTTP authentication of RSS feeds. If not
set (the default), the value of the "servername" option will be
used.
sasl_auto_transition: 0
If enabled, the SASL library will automatically create
authentication secrets when given a plaintext password. See the
SASL documentation.
sasl_maximum_layer: 256
Maximum SSF (security strength factor) that the server will allow
a client to negotiate.
sasl_minimum_layer: 0
The minimum SSF that the server will allow a client to negotiate.
A value of 1 requires integrity protection; any higher value
requires some amount of encryption.
sasl_option: 0
Any SASL option can be set by preceding it with "sasl_". This
file overrides the SASL configuration file.
sasl_pwcheck_method: <none>
The mechanism used by the server to verify plaintext passwords.
Possible values include "auxprop", "saslauthd", and "pwcheck".
search_skipdiacrit: 1
When searching, should diacriticals be stripped from the search
terms. The default is "true", a search for "hav" will match
"Hvard". This is not RFC5051 complient, but it backwards
compatible, and may be preferred by some sites.
search_whitespace: merge
When searching, how whitespace should be handled. Options are:
"skip" (default in 2.3 and earlier series) - where a search for
"equi" would match "the quick brown fox". "merge" - the default,
where "he qu" would match "the quick brownfox", and "keep",
where whitespace must match exactly. The default of "merge" is
recommended for most cases - it's a good compromise which keeps
words separate.
Allowed values: skip, merge, keep
seenstate_db: twoskip
The cyrusdb backend to use for the seen state.
Allowed values: flat, berkeley, berkeley-hash, skiplist, twoskip
sendmail: /usr/lib/sendmail
The pathname of the sendmail executable. Sieve invokes sendmail
for sending rejections, redirects and vacation responses.
serverlist: <none>
Whitespace separated list of backend server names. Used for
finding server with the most available free space for proxying
CREATE.
serverlist_select_mode: freespace-most
Server selection mode.
random
(pseudo-)random selection
freespace-most
backend with the most (total) free space (KiB)
freespace-percent-most
backend whose partition has the most free space (%)
freespace-percent-weighted
same as for partition selection, comparing the free space (%)
of the least used partition of each backend
freespace-percent-weighted-delta
same as for partition selection, comparing the free space (%)
of the least used partition of each backend
Allowed values: random, freespace-most, freespace-percent-
most, freespace-percent-weighted, freespace-percent-weighted-
delta
serverlist_select_usage_reinit: 0
For a given session, number of operations (e.g. backend selection)
for which backend usage data are cached.
serverlist_select_soft_usage_limit: 0
Limit of backend usage (%): if a backend is over that limit, it is
automatically excluded from selection mode.
If all backends are over that limit, this feature is not used
anymore.
servername: <none>
This is the hostname visible in the greeting messages of the POP,
IMAP and LMTP daemons. If it is unset, then the result returned
from gethostname(2) is used. This is also the value used by
murder clusters to identify the host name. It should be
resolvable by DNS to the correct host, and unique within an active
cluster. If you are using low level replication (e.g. drbd) then
it should be the same on each copy and the DNS name should also be
moved to the new master on failover.
serverinfo: on
The server information to display in the greeting and capability
responses. Information is displayed as follows:
"off" = no server information in the greeting or
capabilities
"min" = servername in the greeting; no server information
in the capabilities
"on" = servername and product version in the greeting;
product version in the capabilities
Allowed values: off, min, on
sharedprefix: Shared Folders
If using the alternate IMAP namespace, the prefix for the shared
namespace. The hierarchy delimiter will be automatically
appended.
sieve_allowreferrals: 1
If enabled, timsieved will issue referrals to clients when the
user's scripts reside on a remote server (in a Murder).
Otherwise, timsieved will proxy traffic to the remote server.
sieve_extensions: fileinto reject vacation vacation-seconds imapflags
notify envelope relational regex subaddress copy date index imap4flags
Space-separated list of Sieve extensions allowed to be used in
sieve scripts, enforced at submission by timsieved(8). Any
previously installed script will be unaffected by this option and
will continue to execute regardless of the extensions used. This
option has no effect on options that are disabled at compile time
(e.g., "regex").
Allowed values: fileinto, reject, vacation, vacation-seconds,
imapflags, notify, include, envelope, body, relational, regex,
subaddress, copy, date, index, imap4flags
sieve_maxscriptsize: 32
Maximum size (in kilobytes) any sieve script can be, enforced at
submission by timsieved(8).
sieve_maxscripts: 5
Maximum number of sieve scripts any user may have, enforced at
submission by timsieved(8).
sieve_utf8fileinto: 0
If enabled, the sieve engine expects folder names for the fileinto
action in scripts to use UTF8 encoding. Otherwise, modified UTF7
encoding should be used.
sieve_sasl_send_unsolicited_capability: 0
If enabled, timsieved will emit a capability response after a
successful SASL authentication, per draft-martin-
managesieve-12.txt .
sieve_vacation_min_response: 259200 /* 3 days */
Minimum time interval (in seconds) between consecutive vacation
responses, per draft-ietf-vacation-seconds.txt .
sieve_vacation_max_response: 7776000 /* 90 days */
Maximum time interval (in seconds) between consecutive vacation
responses, per draft-ietf-vacation-seconds.txt .
sievedir: /usr/sieve
If sieveusehomedir is false, this directory is searched for Sieve
scripts.
sievenotifier: <none>
Notifyd(8) method to use for "SIEVE" notifications. If not set,
"SIEVE" notifications are disabled.
This method is only used when no method is specified in the
script.
sieveusehomedir: 0
If enabled, lmtpd will look for Sieve scripts in user's home
directories: ~user/.sieve.
anysievefolder: 0
It must be "yes" in order to permit the autocreation of any INBOX
subfolder requested by a sieve filter, through the "fileinto"
action. (default = no)
singleinstancestore: 1
If enabled, imapd, lmtpd and nntpd attempt to only write one copy
of a message per partition and create hard links, resulting in a
potentially large disk savings.
skiplist_always_checkpoint: 1
If enabled, this option forces the skiplist cyrusdb backend to
always checkpoint when doing a recovery. This causes slightly
more IO, but on the other hand leads to more efficient databases,
and the entire file is already "hot".
skiplist_unsafe: 0
If enabled, this option forces the skiplist cyrusdb backend to not
sync writes to the disk. Enabling this option is NOT RECOMMENDED.
soft_noauth: 1
If enabled, lmtpd returns temporary failures if the client does
not successfully authenticate. Otherwise lmtpd returns permanent
failures (causing the mail to bounce immediately).
specialuse_extra: <none>
Whitespace separated list of extra special-use attributes that can
be set on a mailbox. RFC 6154 currently lists what special-use
attributes can be set. This allows extending that list in the
future or adding your own if needed.
specialusealways: 0
If enabled, this option causes LIST and LSUB output to always
include the XLIST "special-use" flags
sql_database: <none>
Name of the database which contains the cyrusdb table(s).
sql_engine: <none>
Name of the SQL engine to use.
Allowed values: mysql, pgsql, sqlite
sql_hostnames: <empty string>
Comma separated list of SQL servers (in host[:port] format).
sql_passwd: <none>
Password to use for authentication to the SQL server.
sql_user: <none>
Username to use for authentication to the SQL server.
sql_usessl: 0
If enabled, a secure connection will be made to the SQL server.
srvtab: <empty string>
The pathname of srvtab file containing the server's private key.
This option is passed to the SASL library and overrides its
default setting.
submitservers: <none>
A list of users and groups that are allowed to resolve
"urlauth=submit+" IMAP URLs, separated by spaces. Any user listed
in this will be allowed to fetch the contents of any valid
"urlauth=submit+" IMAP URL: use with caution.
subscription_db: flat
The cyrusdb backend to use for the subscriptions list.
Allowed values: flat, berkeley, berkeley-hash, skiplist, twoskip
suppress_capabilities: <none>
Suppress the named capabilities from any capability response. Use
the exact case as it appears in the response, e.g.
"suppress_capabilities: ESEARCH QRESYNC WITHIN XLIST LIST-
EXTENDED" if you have a murder with 2.3.x backends and don't want
clients being confused by new capabilities that some backends
don't support.
statuscache: 0
Enable/disable the imap status cache.
statuscache_db: twoskip
The cyrusdb backend to use for the imap status cache.
Allowed values: berkeley, berkeley-nosync, berkeley-hash,
berkeley-hash-nosync, skiplist, sql, twoskip
statuscache_db_path: <none>
The absolute path to the statuscache db file. If not specified,
will be confdir/statuscache.db
sync_authname: <none>
The authentication name to use when authenticating to a sync
server. Prefix with a channel name to only apply for that channel
sync_host: <none>
Name of the host (replica running sync_server(8)) to which
replication actions will be sent by sync_client(8). Prefix with a
channel name to only apply for that channel
sync_log: 0
Enable replication action logging by lmtpd(8), imapd(8), pop3d(8),
and nntpd(8). The log {configdirectory}/sync/log is used by
sync_client(8) for "rolling" replication.
sync_log_chain: 0
Enable replication action logging by sync_server as well, allowing
chaining of replicas. Use this on 'B' for A => B => C replication
layout
sync_log_channels: <none>
If specified, log all events to multiple log files in directories
specified by each "channel". To run these log files, you need to
pass the -n option to sync_client -r with the channel name. Use
this for a mesh style replication layout - every machine
replicating to every other machine. You can use "" (the two-
character string U+22 U+22) to mean the default sync channel.
sync_log_unsuppressable_channels: squatter
If specified, the named channels are exempt from the effect of
setting sync_log_chain:off, i.e. they are always logged to by the
sync_server process. This is only really useful to allow rolling
search indexing on a replica.
sync_password: <none>
The default password to use when authenticating to a sync server.
Prefix with a channel name to only apply for that channel
sync_port: csync
Name of the service (or port number) of the replication service on
replica host. The default is "csync" which is usally port 2005,
but any service name or numeric port can be specified. Prefix
with a channel name to only apply for that channel
sync_realm: <none>
The authentication realm to use when authenticating to a sync
server. Prefix with a channel name to only apply for that channel
sync_repeat_interval: 1
Minimum interval (in seconds) between replication runs in rolling
replication mode. If a replication run takes longer than this
time, we repeat immediately. Prefix with a channel name to only
apply for that channel
sync_shutdown_file: <none>
Simple latch used to tell sync_client(8) that it should shut down
at the next opportunity. Safer than sending signals to running
processes. Prefix with a channel name to only apply for that
channel
sync_timeout: 1800
Number of seconds to wait for a response before returning a
timeout failure when talking to a replication peer (client or
server).
syslog_prefix: <none>
String to be prepended to the process name in syslog entries.
syslog_facility: <none>
Configure a syslog facility. The default is whatever is compiled
in. Allowed values are: DAEMON, MAIL, NEWS, USER, and LOCAL0
through to LOCAL7
tcp_keepalive: 0
Enable keepalive on TCP connections
tcp_keepalive_cnt: 0
Number of TCP keepalive probes to send before declaring the
connection dead (0 == system default)
tcp_keepalive_idle: 0
Number of seconds a connection must be idle before keepalive
probes are sent (0 == system default)
tcp_keepalive_intvl: 0
Number of seconds between keepalive probes (0 == system default)
temp_path: /tmp
The pathname to store temporary files in
timeout: 30
The length of the IMAP server's inactivity autologout timer, in
minutes. The minimum value is 30, the default.
tls_ca_file: DEFAULT
Deprecated in favor of tls_client_ca_file.
tls_ca_path: DEFAULT
Deprecated in favor of tls_client_ca_dir.
tlscache_db: DEFAULT
Deprecated in favor of tls_sessions_db.
tlscache_db_path: DEFAULT
Deprecated in favor of tls_sessions_db_path.
tls_cert_file: DEFAULT
Deprecated in favor of tls_server_cert.
tls_cipher_list: DEFAULT
Deprecated in favor of tls_ciphers.
tls_ciphers: DEFAULT
The list of SSL/TLS ciphers to allow. The format of the string is
described in ciphers(1).
tls_client_ca_dir: <none>
Path to a directory containing the CA certificates used to verify
client SSL certificates used for authentication.
tls_client_ca_file: <none>
Path to a file containing the CA certificate(s) used to verify
client SSL certificates used for authentication.
tls_client_cert: <none>
File containing the certificate presented to a server for
authentication during STARTTLS. A value of "disabled" will disable
this server's use of certificate-based authentication.
tls_client_certs: optional
Disable ("off"), allow ("optional", default) or require
("require") the use of SSL certificates by clients to authenticate
themselves.
Allowed values: off, optional, require
tls_client_key: <none>
File containing the private key belonging to the tls_client_cert
certificate. A value of "disabled" will disable this server's use
of certificate-based authentication.
tls_eccurve: prime256v1
The elliptic curve used for ECDHE. Default is NIST Suite B
prime256. See 'openssl ecparam -list_curves' for possible values.
tls_key_file: DEFAULT
Deprecated in favor of tls_server_key.
tls_required: 0
If enabled, require a TLS/SSL encryption layer to be negotiated
prior to ANY authentication mechanisms being advertised or
allowed.
tls_prefer_server_ciphers: 0
Prefer the ciphers on the server side instead of client side.
tls_server_ca_dir: <none>
Path to a directory with CA certificates used to verify
certificates offered when this server connects to other servers.
This directory must have filenames with the hashed value of the
certificates (see openssl(1)).
tls_server_ca_file: <none>
Path to a file containing CA certificates used to verify
certificates offered when this server connects to other servers.
tls_server_cert: <none>
File containing the certificate presented to clients.
tls_server_key: <none>
File containing the private key belonging to the certificate in
tls_server_cert.
tls_sessions_db: twoskip
The cyrusdb backend to use for the TLS cache.
Allowed values: berkeley, berkeley-nosync, berkeley-hash,
berkeley-hash-nosync, skiplist, sql, twoskip
tls_sessions_db_path: <none>
The absolute path to the TLS sessions db file. If not specified,
will be confdir/tls_sessions.db
tls_session_timeout: 1440
The length of time (in minutes) that a TLS session will be cached
for later reuse. The maximum value is 1440 (24 hours), the
default. A value of 0 will disable session caching.
tls_versions: tls1_0 tls1_1 tls1_2
A list of SSL/TLS versions to not disable. Cyrus IMAP SSL/TLS
starts with all protocols, and substracts protocols not in this
list. Newer versions of SSL/TLS will need to be added here to
allow them to get disabled.
umask: 077
The umask value used by various Cyrus IMAP programs.
userdeny_db: flat
The cyrusdb backend to use for the user access list.
Allowed values: flat, berkeley, berkeley-hash, skiplist, sql,
twoskip
userdeny_db_path: <none>
The absolute path to the userdeny db file. If not specified, will
be confdir/user_deny.db
username_tolower: 1
Convert usernames to all lowercase before login/authentication.
This is useful with authentication backends which ignore case
during username lookups (such as LDAP).
userprefix: Other Users
If using the alternate IMAP namespace, the prefix for the other
users namespace. The hierarchy delimiter will be automatically
appended.
unix_group_enable: 1
Should we look up groups when using auth_unix (disable this if you
are not using groups in ACLs for your IMAP server, and you are
using auth_unix with a backend (such as LDAP) that can make
getgrent() calls very slow)
unixhierarchysep: 0
Use the UNIX separator character '/' for delimiting levels of
mailbox hierarchy. Turn off to use the netnews separator
character '.'. Note that with the newnews separator, no dots may
occur in mailbox names.
virtdomains: off
Enable virtual domain support. If enabled, the user's domain will
be determined by splitting a fully qualified userid at the last
'@' or '%' symbol. If the userid is unqualified, and the
virtdomains option is set to "on", then the domain will be
determined by doing a reverse lookup on the IP address of the
incoming network interface, otherwise the user is assumed to be in
the default domain (if set).
Allowed values: off, userid, on
lmtp_catchall_mailbox: <none>
Mail sent to mailboxes which do not exist, will be delivered to
this user. NOTE: This must be an existing local user name with an
INBOX, NOT an email address!
zoneinfo_db: twoskip
The cyrusdb backend to use for zoneinfo.
Allowed values: flat, berkeley, berkeley-hash, skiplist, twoskip
zoneinfo_db_path: <none>
The absolute path to the zoneinfo db file. If not specified, will
be confdir/zoneinfo.db
normalizeuid: 0
Lowercase uid and strip leading and trailing blanks. It is
recommended to set this to yes, especially if OpenLDAP is used as
authentication source.
SEE ALSO
imapd(8), pop3d(8), nntpd(8), lmtpd(8), httpd(8), timsieved(8), idled(8), notifyd(8), deliver(8), master(8), ciphers(1)
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