Mutt uses the "even minor number stable, odd minor number development" versioning scheme common to other projects. The current stable public release version is 184.108.40.206. The current development release version is 1.5.21.
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.
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: