Seth Woolley's Man Viewer

Manual for sendmail - man 1 sendmail

([section] manual, -k keyword, -K [section] search, -f whatis)
man plain no title

SENDMAIL(1)                                                        SENDMAIL(1)

       sendmail(1,8) - Postfix to Sendmail compatibility interface

       sendmail(1,8) [option ...] [recipient ...]

       sendmail(1,8) -bp

       sendmail(1,8) -I

       The Postfix sendmail(1,8)(1) command implements the Postfix to Sendmail com-
       patibility interface.  For the  sake  of  compatibility  with  existing
       applications,  some  Sendmail  command-line  options are recognized but
       silently ignored.

       By default, Postfix sendmail(1,8)(1) reads a  message  from  standard  input
       until  EOF  or  until  it  reads  a  line  with only a . character, and
       arranges for delivery.  Postfix sendmail(1,8)(1) relies on  the  postdrop(1)
       command to create a queue(1,3) file(1,n) in(1,8) the maildrop directory.

       Specific  command aliases are provided for other common modes of opera-

       mailq  List the mail(1,8) queue. Each entry shows the queue(1,3) file(1,n) ID, message
              size,  arrival  time(1,2,n), sender, and the recipients that still need
              to be delivered.  If mail(1,8) could not be delivered upon  the  last
              attempt, the reason for failure is shown. This mode of operation
              is implemented by executing the postqueue(1) command.

              Initialize the alias database.  If no input  file(1,n)  is  specified
              (with  the  -oA  option,  see  below), the program processes the
              file(1,n)(s) specified with the alias_database configuration  parame-
              ter.   If  no alias database type is specified, the program uses
              the type specified with the default_database_type  configuration
              parameter.  This mode of operation is implemented by running the
              postalias(1) command.

              Note: it may take a minute or so before an alias database update(7,n)
              becomes  visible.  Use the "postfix reload" command to eliminate
              this delay.

       These and other features can be selected by specifying the  appropriate
       combination  of  command-line  options. Some features are controlled by
       parameters in(1,8) the configuration file.

       The following options are recognized:

       -Am (ignored)

       -Ac (ignored)
              Postfix sendmail(1,8) uses the same configuration file(1,n) regardless  of
              whether or not a message is an initial submission.

       -B body_type
              The message body MIME type: 7BIT or 8BITMIME.

       -bd    Go  into  daemon  mode. This mode of operation is implemented by
              executing the "postfix start" command.

       -bh (ignored)

       -bH (ignored)
              Postfix has no persistent host(1,5) status database.

       -bi    Initialize alias database. See the newaliases command above.

       -bm    Read mail(1,8) from standard input and arrange for delivery.  This is
              the default mode of operation.

       -bp    List the mail(1,8) queue. See the mailq command above.

       -bs    Stand-alone  SMTP  server mode. Read SMTP commands from standard
              input, and write(1,2) responses to standard output.   In  stand-alone
              SMTP  server  mode,  mail(1,8) relaying and other access(2,5) controls are
              disabled by default. To enable them,  run  the  process  as  the
              mail_owner user.

              This  mode  of  operation is implemented by running the smtpd(8)

       -bv    Do not collect or deliver a  message.  Instead,  send(2,n)  an  email
              report  after  verifying each recipient address.  This is useful
              for testing address rewriting and routing configurations.

              This feature is available in(1,8) Postfix version(1,3,5) 2.1 and later.

       -C config_file (ignored)
              The path name of the  file.  Postfix  configuration
              files are kept in(1,8) the /etc/postfix directory.

       -F full_name
              Set  the  sender full name. This is used only with messages that
              have no From: message header.

       -f sender
              Set the envelope sender  address.  This  is  the  address  where
              delivery problems are sent to. With Postfix versions before 2.1,
              the  Errors-To:  message  header  overrides  the  error(8,n)   return

       -G (ignored)
              Gateway  (relay)  submission, as opposed to initial user submis-

       -h hop_count (ignored)
              Hop count limit. Use the hopcount_limit configuration  parameter

       -I     Initialize alias database. See the newaliases command above.

       -i     When  reading  a message from standard input, dont treat a line
              with only a . character as the end of input.

       -L label (ignored)
              The logging label. Use the syslog_name  configuration  parameter

       -m (ignored)
              Backwards compatibility.

       -N dsn (ignored)
              Delivery  status  notification  control. Currently, Postfix does
              not implement DSN.

       -n (ignored)
              Backwards compatibility.

              Non-default alias database. Specify pathname  or  type:pathname.
              See postalias(1) for details.

       -O option=value (ignored)
              Backwards compatibility.

       -o7 (ignored)

       -o8 (ignored)
              To  send(2,n) 8-bit or binary content, use an appropriate MIME encap-
              sulation and specify the appropriate -B command-line option.

       -oi    When reading a message from standard input, dont treat  a  line
              with only a . character as the end of input.

       -om (ignored)
              The sender is never eliminated from alias etc. expansions.

       -o x value (ignored)
              Set  option x to value. Use the equivalent configuration parame-
              ter in(1,8) instead.

       -r sender
              Set the envelope sender  address.  This  is  the  address  where
              delivery problems are sent to. With Postfix versions before 2.1,
              the  Errors-To:  message  header  overrides  the  error(8,n)   return

       -R return_limit (ignored)
              Limit  the  size of bounced mail. Use the bounce_size_limit con-
              figuration parameter instead.

       -q     Attempt to deliver all queued mail. This is implemented by  exe-
              cuting the postqueue(1) command.

              Warning:  flushing  undeliverable mail(1,8) frequently will result in(1,8)
              poor delivery performance of all other mail.

       -qinterval (ignored)
              The interval between queue(1,3) runs. Use the queue_run_delay config-
              uration parameter instead.

              Schedule  immediate  delivery of all mail(1,8) that is queued for the
              named(5,8) site. This option accepts only site names that are  eligi-
              ble  for the "fast flush(8,n)" service, and is implemented by execut-
              ing the postqueue(1) command.  See flush(8,n)(8) for more information
              about the "fast flush(8,n)" service.

              This  command  is  not implemented. Use the slower "sendmail(1,8) -q"
              command instead.

       -t     Extract recipients from message headers. These are added to  any
              recipients specified on the command line.

              With Postfix versions prior to 2.1, this option requires that no
              recipient addresses are specified on the command line.

       -U (ignored)
              Initial user submission.

       -V     Variable Envelope Return Path. Given an envelope sender  address
              of  the  form  owner-listname@origin, each recipient user@domain
              receives mail(1,8) with a personalized envelope sender address.

              By default, the personalized envelope sender address  is  owner-
              listname+user=domain@origin.  The default + and = characters are
              configurable  with  the  default_verp_delimiters   configuration

              This feature is available in(1,8) Postfix version(1,3,5) 1.1 and later.

       -Vxy   As  -V,  but  uses  x  and  y  as the VERP delimiter characters,
              instead of the characters specified with the default_verp_delim-
              iters configuration parameter.

       -v     Send an email report of the first delivery attempt (Postfix ver-
              sions 2.1 and later). Mail delivery always happens in(1,8) the  back-
              ground.  When multiple -v options are given, enable verbose log-
              ging for debugging purposes.

       -X log_file (ignored)
              Log mailer traffic. Use the debug_peer_list and debug_peer_level
              configuration parameters instead.

       By design, this program is not set-user (or group) id. However, it must
       handle data from untrusted users(1,5)  or  untrusted  machines.   Thus,  the
       usual precautions need to be taken against malicious inputs.

       Problems are logged to syslogd(8) and to the standard error(8,n) stream.

              Directory with Postfix configuration files.

              Enable verbose logging for debugging purposes.

              Enable debugging with an external command, as specified with the
              debugger_command configuration parameter.

       The following parameters are especially relevant to  this  pro-
       gram.   The  text  below  provides  only a parameter summary. See post-
       conf(3,5)(5) for more details including examples.

       The DEBUG_README file(1,n) gives examples of how to trouble shoot a  Postfix

       debugger_command (empty)
              The external command to execute when a Postfix daemon program is
              invoked with the -D option.

       debug_peer_level (2)
              The increment in(1,8) verbose logging level when a remote  client  or
              server matches a pattern in(1,8) the debug_peer_list parameter.

       debug_peer_list (empty)
              Optional  list  of  remote  client or server hostname or network
              address  patterns  that  cause  the  verbose  logging  level  to
              increase by the amount specified in(1,8) $debug_peer_level.

       Available in(1,8) Postfix version(1,3,5) 2.2 and later:

       authorized_flush_users (static:anyone)
              List of users(1,5) who are authorized to flush(8,n) the queue.

       authorized_mailq_users (static:anyone)
              List of users(1,5) who are authorized to view the queue.

       authorized_submit_users (static:anyone)
              List  of  users(1,5) who are authorized to submit mail(1,8) with the send-
              mail(1,8)(1) command (and with the privileged postdrop(1) helper com-

       bounce_size_limit (50000)
              The  maximal  amount  of original message text that is sent in(1,8) a
              non-delivery notification.

       fork_attempts (5)
              The maximal number of attempts to fork() a child process.

       fork_delay (1s)
              The delay between attempts to fork() a child process.

       hopcount_limit (50)
              The maximal number of Received:  message headers that is allowed
              in(1,8) the primary message headers.

       queue_run_delay (1000s)
              The time(1,2,n) between deferred queue(1,3) scans by the queue(1,3) manager.

       The  ETRN_README file(1,n) describes configuration and operation details for
       the Postfix "fast flush(8,n)" service.

       fast_flush_domains ($relay_domains)
              Optional list of destinations that are eligible for per-destina-
              tion logfiles with mail(1,8) that is queued to those destinations.

       The  VERP_README  file(1,n) describes configuration and operation details of
       Postfix support for variable envelope return path addresses.

       default_verp_delimiters (+=)
              The two default VERP delimiter characters.

       verp_delimiter_filter (-=+)
              The characters Postfix accepts as VERP delimiter  characters  on
              the Postfix sendmail(1,8)(1) command line and in(1,8) SMTP commands.

       alias_database (see 'postconf(1,5) -d' output)
              The  alias databases for local(8) delivery that are updated with
              "newaliases" or with "sendmail(1,8) -bi".

       command_directory (see 'postconf(1,5) -d' output)
              The location of all postfix administrative commands.

       config_directory (see 'postconf(1,5) -d' output)
              The default location of the Postfix and  con-
              figuration files.

       daemon_directory (see 'postconf(1,5) -d' output)
              The directory with Postfix support programs and daemon programs.

       default_database_type (see 'postconf(1,5) -d' output)
              The default database type for use in(1,8) newaliases(1), postalias(1)
              and postmap(1) commands.

       delay_warning_time (0h)
              The  time(1,2,n) after which the sender receives the message headers of
              mail(1,8) that is still queued.

       enable_errors_to (no)
              Report mail(1,8) delivery errors to the address  specified  with  the
              non-standard  Errors-To: message header, instead of the envelope
              sender address (this feature is removed  with  Postfix  2.2,  is
              turned  off by default with Postfix 2.1, and is always turned on
              with older Postfix versions).

       mail_owner (postfix)
              The UNIX system account that owns the  Postfix  queue(1,3)  and  most
              Postfix daemon processes.

       queue_directory (see 'postconf(1,5) -d' output)
              The location of the Postfix top-level queue(1,3) directory.

       syslog_facility (mail(1,8))
              The syslog(2,3,5,3 Sys::Syslog) facility of Postfix logging.

       syslog_name (postfix)
              The  mail(1,8)  system  name that is prepended to the process name in(1,8)
              syslog(2,3,5,3 Sys::Syslog) records, so that "smtpd"  becomes,  for  example,  "post-

       trigger_timeout (10s)
              The  time(1,2,n)  limit  for sending a trigger to a Postfix daemon (for
              example, the pickup(8) or qmgr(8) daemon).

       /var/spool/postfix, mail(1,8) queue(1,3)
       /etc/postfix, configuration files

       pickup(8), mail(1,8) pickup daemon
       qmgr(8), queue(1,3) manager
       smtpd(8), SMTP server
       flush(8,n)(8), fast flush(8,n) service
       postsuper(1), queue(1,3) maintenance
       postalias(1), create/update(7,n)/query alias database
       postdrop(1), mail(1,8) posting utility
       postfix(1), mail(1,8) system control
       postqueue(1), mail(1,8) queue(1,3) control
       syslogd(8), system logging

       Use "postconf(1,5) readme_directory" or
       "postconf(1,5) html_directory" to locate this information.
       DEBUG_README, Postfix debugging howto
       ETRN_README, Postfix ETRN howto
       VERP_README, Postfix VERP howto

       The Secure Mailer license must be distributed with this software.

       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA


References for this manual (incoming links)