MTA comparision
===============

Candidates:
- sendmail
- postfix
- qmail
- exim
- masqmail

- (exchange, ...)


Author
------
sendmail: Eric Allman and others, now Sendmail Inc.
postfix: Wietse Venema and many others
qmail: Daniel J. Bernstein
exim: Philip Hazel
masqmail: Oliver Kurth
exchange: Microsoft Corporation


License
-------
sendmail: Sendmail License
postfix: IBM Public License
qmail: public domain
exim: GPL
masqmail: GPL 
exchange: MS-EULA


First release
-------------
sendmail: 1983
postfix: 1999
qmail: 1995
exim: 1995
masqmail: 1999
exchange: 1993


Lines of code (with sloccount on debian packages)
-------------------------------------------------
sendmail: 93k
postfix: 92k
qmail: 18k
exim: 54k
masqmail: 14k
exchange: (no source available)


Architecture
------------
sendmail: monolitic
postfix: modular
qmail: modular
exim: monolitic
masqmail: monolitic
exchange: (unknown)


Design goals
------------
sendmail: flexibility
postfix: performance and security
qmail: security
exim: general, flexible & extensive facilities for checking
masqmail: for non-permanent internet connection
exchange: groupware


Market share (by Bernstein in 2001)
-----------------------------------
sendmail: 42%
postfix: 1.6%
qmail: 17%
exim: 1.6%
masqmail: (unknown)
exchange: 18%