The current stable public release version is 1.6.1.
As of 1.6, Mutt has switched away from the dev/stable versioning scheme. Going forward, version numbers will be incremented based on the significance of the release.
The source releases prior to 1.5.14 are signed with Thomas Roessler's
The source releases from 1.5.14 on are signed with Brendan Cully's GnuPG key.
The source releases from 1.5.24 on are signed with Kevin McCarthy's GnuPG key.
For information on getting pre-release code from Mutt's source repository, see dev.mutt.org.
Note: Most modern distributions ship with their own packaged versions of Mutt. Links to Mutt packages from various package systems and some user-contributed packages are below.BSD: