sendmail



SENDMAIL(1)                                                        SENDMAIL(1)




NAME

       sendmail - Postfix to Sendmail compatibility interface


SYNOPSIS

       sendmail [option ...] [recipient ...]

       mailq
       sendmail -bp

       newaliases
       sendmail -I


DESCRIPTION

       The  sendmail  program implements the Postfix to Sendmail compatibility
       interface.  For the sake of compatibility with  existing  applications,
       some Sendmail command-line options are recognized but silently ignored.

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

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

       mailq  List the mail queue. Each entry shows the queue file ID, message
              size,  arrival  time, sender, and the recipients that still need
              to be delivered.  If mail 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.

       newaliases
              Initialize the alias database.  If no input  file  is  specified
              (with  the  -oA  option,  see  below), the program processes the
              file(s) specified with the alias_database configuration  parame-
              ter.   If  no alias database type is specified, the program uses
              the type specified with the database_type configuration  parame-
              ter.   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
              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 the main.cf configuration file.

       The following options are recognized:

       -B body_type (ignored)
              The message body MIME type. Currently, Postfix implements  just-
              send-eight.

       -C config_file (ignored :-)
              The  path  name  of  the sendmail.cf file. Postfix configuration
              files are kept in /etc/postfix.

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

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

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

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

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

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

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

       -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 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
              parameter.

       -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.

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

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

       -bm    Read mail from standard input and arrange for delivery.  This is
              the default mode of operation.

       -bp    List the mail queue. See the mailq command above.

       -bs    Stand-alone  SMTP  server mode. Read SMTP commands from standard
              input, and write responses to standard output.   In  stand-alone
              SMTP  server mode, UCE restrictions and access controls are dis-
              abled by default.  To  enable  them,  run  the  process  as  the
              mail_owner user.

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

       -f sender
              Set the envelope sender  address.  This  is  the  address  where
              delivery  problems  are  sent to, unless the message contains an
              Errors-To: message header.

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

       -i     When  reading  a message from standard input, don't treat a line
              with only a . character as the end of input.

       -m (ignored)
              Backwards compatibility.

       -n (ignored)
              Backwards compatibility.

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

       -o7 (ignored)

       -o8 (ignored)
              The  message body type. Currently, Postfix implements just-send-
              eight.

       -oi    When reading a message from standard input, don't 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 main.cf instead.

       -r sender
              Set the envelope sender  address.  This  is  the  address  where
              delivery  problems  are  sent to, unless the message contains an
              Errors-To: message header.

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

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

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

       -qSsite
              This command is not implemented. Use the slower sendmail -q com-
              mand instead.

       -t     Extract  recipients  from message headers. This requires that no
              recipients be specified on the command line.

       -v     Enable verbose  logging  for  debugging  purposes.  Multiple  -v
              options make the software increasingly verbose.


SECURITY

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


DIAGNOSTICS

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


ENVIRONMENT

       MAIL_CONFIG
              Directory with Postfix configuration files.

       MAIL_VERBOSE
              Enable verbose logging for debugging purposes.

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


FILES

       /var/spool/postfix, mail queue
       /etc/postfix, configuration files


CONFIGURATION PARAMETERS

       See the Postfix main.cf file for syntax details and for default values.
       Use the postfix reload command after a configuration change.

       alias_database
              Default  alias database(s) for newaliases. The default value for
              this parameter is system-specific.

       bounce_size_limit
              The amount of original message context that is sent along with a
              non-delivery notification.

       database_type
              Default  alias  etc.  database  type.  On  many UNIX systems the
              default type is either dbm or hash.

       debugger_command
              Command that is executed after a Postfix daemon has initialized.

       debug_peer_level
              Increment  in verbose logging level when a remote host matches a
              pattern in the debug_peer_list parameter.

       debug_peer_list
              List of domain or network patterns. When a remote host matches a
              pattern, increase the verbose logging level by the amount speci-
              fied in the debug_peer_level parameter.

       default_verp_delimiters
              The VERP delimiter characters that are used when the -V  command
              line option is specified without delimiter characters.

       fast_flush_domains
              List of domains that will receive "fast flush" service (default:
              all domains that this system is willing to relay mail to).  This
              list specifies the domains that Postfix accepts in the SMTP ETRN
              request and in the sendmail -qR command.

       fork_attempts
              Number of attempts to fork() a process before giving up.

       fork_delay
              Delay in seconds between successive fork() attempts.

       hopcount_limit
              Limit the number of Received: message headers.

       mail_owner
              The owner of the mail queue and of most Postfix processes.

       command_directory
              Directory  with  Postfix  support   commands   (default:   $pro-
              gram_directory).

       daemon_directory
              Directory with Postfix daemon programs (default: $program_direc-
              tory).

       queue_directory
              Top-level directory of the Postfix queue. This is also the  root
              directory of Postfix daemons that run chrooted.

       queue_run_delay
              The time between successive scans of the deferred queue.

       verp_delimiter_filter
              The  characters  that  Postfix accepts as VERP delimiter charac-
              ters.


SEE ALSO

       pickup(8) mail pickup daemon
       postalias(1) maintain alias database
       postdrop(1) mail posting utility
       postfix(1) mail system control
       postqueue(1) mail queue control
       qmgr(8) queue manager
       smtpd(8) SMTP server
       flush(8) fast flush service
       syslogd(8) system logging


LICENSE

       The Secure Mailer license must be distributed with this software.


AUTHOR(S)

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



                                                                   SENDMAIL(1)

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