Eric Allman developed sendmail and its precursor delivermail in the late 1970s and early 1980s at the University of California, Berkeley. The program was designed to deliver email over the still relatively small ARPANET network, and supports a variety of mail transfer protocols, including SMTP, ESMTP, and DECnet’s Mail-11. In 1998, he founded Sendmail, Inc.
via January 9, 2014: People of ACM: Eric Allman — Association for Computing Machinery.