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)
Read Also:
- Sendmail.cf
messaging sendmail’s configuration file, which it reads once when starting up, usually found in the /etc directory. Only real Unix Gurus can understand, let alone modify, this file since it consists moslty of header rewrite rules written as M4 macros, as well as various other one- or two-character commands. (1996-12-09)
- Sendmail inc.
company The company, announced in November 1997 and launched in March 1998, created by Eric Allman, the original author of Sendmail. Allman is Chief Technology Officer, Greg Olson is President and CEO. Sendmail Inc. will sell commercial upgrades, service and support to Internet Service Providers and corporations running critical e-mail applications, while still continuing freeware […]
- Sendoff
noun 1. a demonstration of good wishes for a person setting out on a trip, career, or other venture: They gave him a rousing send-off at the pier. 2. a start given to a person or thing. noun (informal) 1. a demonstration of good wishes to a person about to set off on a journey, […]
- Send-off
noun 1. a demonstration of good wishes for a person setting out on a trip, career, or other venture: They gave him a rousing send-off at the pier. 2. a start given to a person or thing. send-off
- Send on
1. Forward something, as in He’s moved; I’ll send on this letter to his new address. [ First half of 1800s ] 2. send someone on. Cause someone to go on an errand or path, as in I sent your brother on an errand but he should be back soon, or They’ve sent us on […]