Qmail Server

qmail is a modern SMTP server which makes sendmail obsolete, written by Dan Bernstein. qmail is a secure package. There was a $1,000.00 prize for anyone who can show otherwise, which went unclaimed.

A number of large Internet sites are using qmail: Hotmail's outgoing mail, USA.net's outgoing email, Rediffmail.com (3.5M users, adding 30K users/day), Satyam Infoway, Colonize.com (sending 6M opt-in emails/day), Yahoo! mail, Network Solutions, listserv.acsu.buffalo.edu (a big listserv hub, using qmail since 1996), Ohio State (biggest US University), XOOM.com, RIPE, Critical Path (email outsourcing service w/ 7M mailboxes) and thousands more.

qmail is designed for high security and heavy traffic. Sendmail has a long history of serious security problems. When Sendmail was written, the Net was a much friendlier place. Everyone knew everyone else, and there was little need to design and code for high security. Today's Internet is a much more hostile environment for network servers.