Sendmail

sendmail

   <messaging> The {BSD} Unix {Message Transfer Agent} supporting
   mail transport via {TCP/IP} using {SMTP}.  Sendmail is
   normally invoked in the {background} via a {Mail User Agent}
   such as the {mail} command.

   Sendmail was written by {Eric Allman} at the {University of
   California at Berkeley} during the late 1970s.  He now has his
   own company, {Sendmail Inc.}

   Sendmail was one of the first programs to route messages
   between {networks} and today is still the dominant e-mail
   transfer software.  It thrived despite the awkward {ARPAnet}
   transition between {NCP} to TCP protocols in the early 1980s
   and the adoption of the new SMTP Simple Mail Transport
   Protocol, all of which made the business of mail routing a
   complex challenge of backward and forward compatibility for
   several years.  There are now over one million copies of
   Sendmail installed, representing over 75% of all Internet mail
   servers.

   Simultaneously with the announcement of the company in
   November 1997, Sendmail 8.9 was launched, featuring new tools
   designed to limit {junk e-mail}.  SendMail 8.9 is still
   distributed as {source code} with the rights to modify and
   distribute.

   Latest version: 8.9.1, as of 1998-08-25.

   The command

   	sendmail -bv ADDRESS

   can be used to learn what the local mail system thinks of
   ADDRESS.  You can also talk to the Sendmail {daemon} on a
   remote host FOO with the command

   	telnet FOO 25

   (1998-08-25)