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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 clone only the HEAD branch (where mainline development happens. You can omit the #HEAD to clone the entire repository, but then you will need to use another command to check out the latest version into your working directory after the clone:

hg update -C HEAD

Afterwards, hg pull -u should keep you up to date.

Note that if you make local clones of the repository, they will revert to the "default" branch unless you explicitly specify #HEAD again while cloning.
Use "hg summary" to check you are on the HEAD branch.

$ hg clone mutt-pristine-tree#HEAD myfeature-tree
$ cd myfeature-tree
$ hg summary
parent: ...
branch: HEAD

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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