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 extensive, and in particular it has some defences against mail bombs and unsolicited junk mail in the form of options for refusing messages from particular hosts, networks, or senders. It can be installed in place of sendmail, although the configuration of exim is quite different to that of sendmail.

An expanded introduction is available.

New Things

• Please note that this web site is updated asynchronously with exim releases, and may sometimes trail versions by a few days or even weeks
• Exim version 3.35 and 4.01 have both been released. These are bug fix releases over the previous versions.
• Exim Version 4.00 is available - see the availability pages to get hold of a copy. This is a major new release with some major changes from version 3.x, as such it should be treated with care.
• Exim course at Cambridge on 24-26 June, 2002.
• Exim Version 3.34 is available - see the availability pages to get hold of a copy. Documentation has been patially updated to match. Version 3.34 fixes an exploitable (in rare configurations) security bug - upgrading is strongly recommended.
• Printed copies of the Exim 3 documentation are available from BSDMall as part of Prime Freeware's Dossier project (NB this is a printed form of documents bundled in electronic form with Exim).
• The information on the Mailing Lists also now contains a search form.
• A Generic Windows Executable Content filter is available at ftp://ftp.exim.org/pub/filter/ or here. This is an exim system filter which attempts to detect executables including the types responsible for the Windows/Outlook mail worms, and also the recent bugs with header length checking (see this BugTraq article). It is not infallible, but many sites may find it useful. The file contains installation instructions. NB this is no longer being maintained.

Exim Book

The definitive exim book, written by Philip Hazel, is now available. Orders can be placed through a number of the on-line retailers.

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