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The Exim Home Page

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet. It is freely available under the terms of the GNU General Public Licence. In style it is similar to Smail 3, but its facilities are more general. There is a great deal of flexibility in the way mail can be routed, and there are extensive facilities for checking incoming mail. Exim can be installed in place of sendmail, although the configuration of exim is quite different to that of sendmail.


This is a volunteer run website with no connection to The University of Cambridge or any other institution.

Current Versions

The current version of Exim is 4.30. See the Download page to get a copy.

Exim 3 and previous versions are now considered obsolete. Exim 3 is not being developed any further, nor is it being actively maintained, though if a really serious bug were found, it would be looked at.

Exim Books

The new Exim 4 book is available. See the book website for further information.

The O'Reilly Exim 3 book is still available.


Nigel Metheringham
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