qmail-send(8)


NAME

   qmail-send - deliver mail messages from the queue

SYNOPSIS

   qmail-send

DESCRIPTION

   qmail-send  handles  messages  placed into the outgoing queue by qmail-
   queue.  It uses qmail-lspawn to deliver messages  to  local  recipients
   and  qmail-rspawn  to  deliver  messages  to  remote  recipients.  If a
   message is temporarily undeliverable to one or more  addresses,  qmail-
   send leaves it in the queue and tries the addresses again later.

   qmail-send  prints a readable record of its activities to descriptor 0.
   It writes commands to qmail-lspawn, qmail-rspawn,  and  qmail-clean  on
   descriptors 1, 3, and 5, and reads responses from descriptors 2, 4, and
   6.  qmail-send is responsible for avoiding deadlock.

   If qmail-send receives a TERM  signal,  it  will  exit  cleanly,  after
   waiting  (possibly more than a minute) for current delivery attempts to
   finish.

   If qmail-send receives an ALRM signal, it will reschedule every message
   in the queue for immediate delivery.

CONTROL FILES

   WARNING:  qmail-send  reads  its control files only when it starts.  If
   you change the control files, you must  stop  and  restart  qmail-send.
   Exception:  If  qmail-send receives a HUP signal, it will reread locals
   and virtualdomains.

   bouncefrom
        Bounce username.  Default: MAILER-DAEMON.

   bouncehost
        Bounce host.  Default: me, if  that  is  supplied;  otherwise  the
        literal  name bouncehost, which is probably not what you want.  If
        a message is permanently undeliverable, qmail-send sends a single-
        bounce  notice  back to the message's envelope sender.  The notice
        is From: bouncefrom@bouncehost, although its  envelope  sender  is
        empty.

   concurrencylocal
        Maximum  number of simultaneous local delivery attempts.  Default:
        10.  If 0, local deliveries will be put on hold.  concurrencylocal
        is limited at compile time to 120.

   concurrencyremote
        Maximum number of simultaneous remote delivery attempts.  Default:
        20.   If   0,   remote   deliveries   will   be   put   on   hold.
        concurrencyremote is limited at compile time to 120.

   doublebouncehost
        Double-bounce  host.   Default: me, if that is supplied; otherwise
        the literal name doublebouncehost, which is probably not what  you
        want.

   doublebounceto
        User  to  receive  double-bounces.   Default:  postmaster.   If  a
        single-bounce  notice  is  permanently  undeliverable,  qmail-send
        sends  a  double-bounce notice to doublebounceto@doublebouncehost.
        (If that bounces, qmail-send gives up.)

   envnoathost
        Presumed domain name for addresses without @ signs.  Default:  me,
        if that is supplied; otherwise the literal name envnoathost, which
        is probably not what you want.  If  qmail-send  sees  an  envelope
        recipient address without an @ sign, it appends @envnoathost.

   locals
        List  of domain names that the current host receives mail for, one
        per line.  Default: me, if that is supplied; otherwise  qmail-send
        refuses  to  run.   An  address user@domain is considered local if
        domain is listed in locals.

   percenthack
        List of domain names where the percent hack is applied.  If domain
        is listed in percenthack, any address of the form user%fqdn@domain
        is rewritten as user@fqdn.  user may contain  %,  so  the  percent
        hack  may  be  applied repeatedly.  qmail-send handles percenthack
        before locals.

   queuelifetime
        Number of seconds a message  can  stay  in  the  queue.   Default:
        604800  (one  week).  After this time expires, qmail-send will try
        the message once more, but it will treat  any  temporary  delivery
        failures as permanent failures.

   virtualdomains
        List  of  virtual  users or domains, one per line.  A virtual user
        has the form user@domain:prepend, without any extra spaces.   When
        qmail-send  sees the recipient address user@domain, it converts it
        to prepend-user@domain and treats it as local.

        A virtual domain has the form domain:prepend.  It applies  to  any
        recipient address at domain.  For example, if

             nowhere.mil:joe-foo

        is  in virtualdomains, and a message arrives for info@nowhere.mil,
        qmail-send  will  rewrite  the  recipient  address   as   joe-foo-
        info@nowhere.mil and deliver the message locally.

        virtualdomains may contain wildcards:

             .fax:uucp-fax
             :alias-catchall
             .nowhere.mil:joe-foo-host

        virtualdomains may also contain exceptions: an empty prepend means
        that domain is not a virtual domain.

        qmail-send handles virtualdomains after locals:  if  a  domain  is
        listed in locals, virtualdomains does not apply.

SEE ALSO

   nice(1),  addresses(5),  envelopes(5),  qmail-control(5), qmail-log(5),
   qmail-queue(8), qmail-clean(8), qmail-lspawn(8), qmail-rspawn(8)

                                                             qmail-send(8)





Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.





Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.


Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.





Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.


Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.





Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.


Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.