smtpd(1M)                        UNIX System V                        smtpd(1M)


NAME
      smtpd - receive incoming SMTP messages

SYNOPSIS
      smtpd [ -n ] [ -H helohost ] [ -h thishost ] [ -L loadlim ] [ -l maxprocs
      ]

DESCRIPTION
      smtpd is a daemon that normally runs while in multi-user mode, waiting
      for requests from remote hosts to send mail.  smtpd listens for these
      requests on any TLI-based network for which the SMTP service is defined
      (to netdirgetbyname(3)).  Normally, this will only be the ``tcp''
      network.  As requests are received, smtpd will fork off child smtpd
      processes to handle each individual SMTP transaction.

      The options to smtpd and their meanings are as follows:

      -n          Do not create smtpsched processes to process the incoming
                  mail.  Rely on the hourly cron(1) invocation of smtpsched
                  instead.

      -H helohost This option can be used to specify the name to be used for
                  the host in the initial SMTP HELO message.  If it is not
                  specified, the name used in the HELO message defaults to the
                  system node name.

      -h thishost Specify the network name to be prepended onto the sender path
                  in the From line of the message.  This option is passed
                  through to the fromsmtp program.

      -L loadlim  Specify the maximum load at which smtpd will create children.
                  If this option is not specified, there is no limit to the
                  load at which children may run.  The load is determined by
                  reading the kernel variable avenrun.

      -l maxprocs This option is used to specify the maximum number of children
                  of smtpd that can be running at once.  Each child handles one
                  SMTP conversation.  If this option is not specified, there is
                  no limit to the number of children that may run.

      Mail that is successfully received is piped to the fromsmtp command,
      which in turn delivers the mail by piping it to rmail.  A log of all
      smtpd's activities is kept in the file /var/spool/smtpq/LOG.

FILES
      /dev/kmem                To get the current machine load (avenrun)

      /etc/services            List of TCP/UDP services (SMTP should be 25/tcp)

      /etc/net/*/services      List of other TLI networks' services




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smtpd(1M)                        UNIX System V                        smtpd(1M)


      /usr/lib/mail/surrcmd/fromsmtp
                               Where incoming mail is piped to

      /var/spool/smtpq/LOG     Log of smtpd transactions

SEE ALSO
      cron(1M), fromsmtp(1M), smtp(1M)















































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