smtpd(1M)                                                         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)





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   smtpd(1M)                                                         smtpd(1M)


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

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

         /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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