Ubuntu Full Email Stack

On Ubuntu Linux the ability to run a fast, efficient, and secure in-house email system is made relatively easy. There is an out of the box installation that gets you very close and with a relatively small amount of configuration, makes a nice robust email server suite. This is a nice way to be fully in control of your own internal company email without paying monthly mailbox fees to an outside provider. Many public mail servers on the internet run Postfix.

Postfix is:

• Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail.
• It is released under the IBM Public License 1.0 which is a free software license. Alternatively, starting with version 3.2.5, it is available under the Eclipse Public License 2.0 at the user's option.
• Originally written in 1997 by Wietse Venema at the IBM Thomas J. Watson Research Center in New York, and first released in December 1998, Postfix continues as of 2018 to be actively developed by its creator and other contributors. The software is also known by its former names VMailer and IBM Secure Mailer.
• In December 2017 in a study performed by E-Soft, Inc., approximately 33% of the publicly reachable mail-servers on the Internet ran Postfix.