Exim Internet Mailer

Exim Internet Mailer
Exim Internet Mailer
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Latest Version: 4.99.1
Exim is a message transfer agent (MTA) originally 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.
All versions of Exim previous to version 4.99.1 are now obsolete. The last 3.x release was 3.36. It is twenty years obsolete and should not be used.
The current version is 4.99.1.
This is a security release. It addresses a possible remote heap corruption. Please check
EXIM-Security-2025-12-09.1 | CVE-2025-67896
for more details.
If necessary, we publish maintenance releases. These releases are mainly intended for package maintainers.
There may be beta versions available from the ftp sites in the Testing directory. Many people are using these without problems, but they are not recommended unless you are willing to work with beta software.
You may wish to purchase
The Exim SMTP Mail Server
book, written by the original author of Exim,
Philip Hazel
The following organizations provide services which help the Exim project:
Mythic Beasts
provide us with a VM for running the buildfarm, for the testsuite.
MacStadium
provide us a Mac Mini for our buildfarm.
Schlittermann - Internet & Unix Support
provide us resources for hosting and administering the exim.org infrastructure.
Website design by
Mike Cardwell