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Mutt developer resources

Bug tracking system

This trac exists primarily for bug tracking: see report:3

To add new tickets or comment on tickets, you must be logged in to protect us from spam.
You can register immediately using the link on the menu bar.
Note: a valid email address is required (the registration page incorrectly states that it is optional).
A confirmation link will be emailed to you. Sorry about that, we'd turn it off if the spammers would let us.
Note: bug entries are forwarded to the mutt developer's list, making the email address you register with public.

When reporting new tickets, please make sure that

  • you find a short but meaningful summary
  • describe a procedure for others to reproduce the problem (if possible)
  • select properties carefully, especially the priority, component and type fields
  • add "patch" to the keywords field when you have a proposed solution

See DebugTips for things to do to help diagnose a bug so that we can fix it faster.


Browse the manual for the development version, updated nightly.


The source code is maintained in a Mercurial repository here. You can pull your own copy for hacking with

hg clone

This will default to the default branch, where mainline development happens. Afterwards, hg pull -u should keep you up to date.

There is also the stable branch where the latest stable version of mutt is tracked. Bugfixes are committed into stable and then merged back into default, while new features go into default.

Nightly snapshots

Download a nightly snapshot of the mutt distribution here

Release roadmap

The roadmap has the current list of bugs blocking the release of Mutt 1.6. There is also a TODO for the next point release here.

Developer Resources

The mutt source contains some developer resources in the contrib/ subdirectory, namely:

When preparing/maintaining 3rd patches, see:


This lists topics that we're currently collecting ideas for:

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