Qmail

qmail
Original author(s)Daniel J. Bernstein
Final release
1.03 / June 15, 1998 (1998-06-15)
Repositorycr.yp.to/software/qmail-1.03.tar.gz
Written inC
Operating systemUnix-like
TypeMail transfer agent
Licensepublic domain
Websitecr.yp.to/qmail.html
netqmail
Final release
1.06 / November 30, 2007 (2007-11-30)
Repositorynetqmail.org/netqmail-1.06.tar.gz
Websitenetqmail.org
s/qmail
Stable release
4.3.20 / January 16, 2025 (2025-01-16)
Websitefehcom.de/sqmail/sqmail.html
notqmail
Stable release
1.09 / May 6, 2024 (2024-05-06)
Repositorygithub.com/notqmail/notqmail
Websitenotqmail.org

qmail is a mail transfer agent (MTA) that runs on Unix. It was written, starting December 1995, by Daniel J. Bernstein as a more secure alternative to the popular Sendmail program. Originally license-free software, qmail's source code was later dedicated to the public domain by the author.