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Postfix
An open source mail transfer agent (MTA) used to handle the delivery of email messages on a server. It was created as an alternative to Sendmail. Postfix has a modular architecture that allows you to create a very reliable and fast mail system.
| First released | 1999 |
| Developed by | Wietse Zweitze Venema |
| Latest stable version | Postfix 3 |
| Open-source | Yes |
| Used by | Apple, Microsoft, Google |
Interesting facts
Compatible with AIX, BSD, HP-UX, IRIX, GNU / Linux, Mac OS X, Solaris, Tru64 UNIX, can actually be compiled on any Unix-like operating system that supports POSIX and has a C compiler. It is the default mail forwarding service in the NetBSD operating system.