table(5)

NAME

     table --- format description for smtpd tables

DESCRIPTION

     This manual page documents the file format for the various tables used in
     the smtpd(8) mail daemon.

     The format described here applies to tables as defined in smtpd.conf(5).

TABLE TYPES

     There are two types of tables: lists and mappings.  A list consists of a
     series of values, while a mapping consists of a series of keys and their
     associated values.  The following illustrates how to declare them as
     static tables:

       table mylist { value1, value2, value3 }
       table mymapping { key1 = value1, key2 = value2, key3 = value3 }

     When using a 'file' table, a list will be written with each value on a
     line by itself:

       value1
       value2
       value3

     A mapping will be written with each key and value on a line, whitespaces
     separating both columns:

       key1    value1
       key2    value2
       key3    value3

     A file table can be converted to a Berkeley database using the makemap(8)
     utility with no syntax change.

     Tables using a 'file' or Berkeley DB backend will be referenced as
     follows:

       table name file:/path/to/file
       table name db:/path/to/file.db

   Aliasing tables
     Aliasing tables are mappings that associate a recipient to one or many
     destinations.  They can be used in two contexts: primary domain aliases
     and virtual domain mapping.

       accept for domain example.org alias <myaliases> deliver to mbox
       accept for domain example.org virtual <myaliases> deliver to mbox

     In a primary domain context, the key is the user part of the recipient
     address, whilst the value is one or many recipients as described in
     aliases(5):

       user1   otheruser
       user2   otheruser1,otheruser2
       user3   [email protected]

     In a virtual domain context, the key is either a user part, a full email
     address or a catch all, following selection rules described in
     smtpd.conf(5), and the value is one or many recipients as described in
     aliases(5):

       user1                   otheruser
       [email protected]       otheruser1,otheruser2
       @example.org            [email protected]
       @                       [email protected]

   Domain tables
     Domain tables are simple lists of domains.  They can only be used in one
     context:

       accept for domain <mydomains> deliver to mbox

     In that context, the list of domains will be matched against the
     recipient domain.  For 'static', 'file' and dbopen(3) backends, a
     wildcard may be used so the domain table may contain:

       example.org
       *.example.org

   Credentials tables
     Credentials tables are mappings of credentials.  They can be used in two
     contexts:

       listen on tls [...] auth <credentials>
       accept for any relay tls+auth://label@host auth <credentials>

     In a listener context, the credentials are a mapping of username and
     encrypted passwords:

       user1   $2a$06$hIJ4QfMcp.90nJwKqGbKM.MybArjHOTpEtoTV.DgLYAiThuoYmTSe
       user2   $2a$06$bwSmUOBGcZGamIfRuXGTvuTo3VLbPG9k5yeKNMBtULBhksV5KdGsK

     The passwords are to be encrypted using the smtpctl(8) encrypt
     subcommand.

     In a relay context, the credentials are a mapping of labels and
     username:password pairs, where the username may be omitted if identical
     to the label:

       label1  user:password
       label2  password

     The label must be unique and is used as a selector for the proper
     credentials when multiple credentials are valid for a single destination.
     The password is not encrypted as it must be provided to the remote host.

   Netaddr tables
     Netaddr tables are lists of IPv4 and IPv6 network addresses.  They can
     only be used in the following context:

       accept from source <netaddr> for domain example.org deliver to mbox

     When used as a "from source", the address of a client is compared to the
     list of addresses in the table until a match is found.

     A netaddr table can contain exact addresses or netmasks, and looks as
     follow:

       192.168.1.1
       ::1
       ipv6:::1
       192.168.1.0/24

   Userinfo tables
     User info tables are used to described virtual system users.  They are
     used in rule context to specify an alternate user base, mapping virtual
     users to local system UID, GID and home directory.

       accept for domain example.org userbase <userinfo> deliver to maildir

     The userinfo table is a mapping from virtual user names to a set of
     system user ID, group ID and path to home directory.

     A userinfo table looks as follows:

       joe     1000:100:/home/virtual/joe
       jack    1000:100:/home/virtual/jack

     In this example, both joe and jack are virtual users mapped to the local
     system user with UID 1000 and GID 100, but different home directories.
     These directories may contain a forward(5) file.

   Source tables
     Source tables are lists of IPv4 and IPv6 addresses.  They can only be
     used in the following context:

       accept for domain example.org relay source <addresses>

     Successive queries to the source table will return the elements one by
     one.

     A source table looks as follow:

       192.168.1.2
       192.168.1.3
       ::1
       ::2
       ipv6:::3
       ipv6:::4

   Mailaddr tables
     Mailaddr tables are lists of email addresses.  They can be used in the
     following contexts:

       accept sender <senders> for domain example.org deliver to mbox
       accept for domain example.org recipient <recipients> deliver to mbox

     A mailaddr entry is used to match an email address against a username, a
     domain or a full email address.  A "*" wildcard may be used in part of
     the domain name.

     A mailaddr table looks as follow:

       user
       @domain
       user@domain
       user@*.domain

   Addrname tables
     Addrname tables are used to map IP addresses to hostnames.  They can be
     used in both listen context and relay context:

       listen on 0.0.0.0 hostnames <addrname>
       accept for any relay hostnames <addrname>

     In listen context, the table is used to look up the server name to
     advertise depending on the local address of the socket on which a
     connection is accepted.  In relay context, the table is used to determine
     the hostname for the HELO sequence of the SMTP protocol, depending on the
     local address used for the outgoing connection.

     The format is a mapping from inet4 or inet6 addresses to hostnames:

       ::1             localhost
       127.0.0.1       localhost
       88.190.23.165   www.opensmtpd.org

SEE ALSO

     smtpd.conf(5), makemap(8), smtpd(8)

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