Open Source Mail Server

Question

is there any open Source Mail Server ?

I want some mail server with open source on linux , so that i can modify myself for my application .

Answer 1

There are several widely used free email servers of which the best known are:

• Sendmail: Known for its cryptic configuration file syntax. Sendmail.cf is legendary for this, and is actually turing complete.

• Exim: Another widely used open-source email server.

• Postfix: This is noted for its efficiency and security by design. I've been using Postfix since about 2000.

• Qmail: Made by Daniel Bernstein, who tends to elicit love-or-hate reactions. Its T&Cs prohibit redistributing modified versions.

Edit: Apparently DJB has relaxed the restrictions on modifying qmail. Props to tkadlubo for noting this.

Answer 2

Wikipedia has a big list of mail servers, but doesn't mention which ones are free.

For Linux there's postfix, exim and plenty more.

Answer 3

For windows hMailServer and Argosoft mailserver.net.

Answer 4

The most common mailserver of this type is "Sendmail" most unix systems either have it installed or can add it as a package. Sendmail will run in a Cygwin shell if you want to run it on a windows box or you can download a cross platform version.
Sendmail is tried, tested and a very mature program. You can do quite a bit with it!

Hope this helps you find a good starting point.

http://www.sendmail.org/

Answer 5

There's also qmail but I like postfix more.

Also, you can try eBox Platform which integrates postfix. (disclosure: I work for eBox)

Answer 6

If you need to hack your mail server (why, oh, why?), maybe you should take a look at the LamsonProject.

Answer 7

If you are a beginner, postfix is the easiest to configure, and its quite fast and secure. I heard Exim is good, but i havn't used it.