Release Notes: "mu find" now supports mail threading (using the JWZ algorithm) and execution of shell commands on matching messages. New GNU-Guile bindings let you inspect messages and get various statistics about them.
Release Notes: mu/mu4e now supports 'related' messages (a la Gmail). Support for querying specific mailing lists was added. Guile scripts were integrated ('mu script'). Support for embedded tags was improved, 'human dates' were implemented, and many other improvements were made.
Release Notes: This release adds crypto-support for both mu and mu4e, improved support for non-ASCII, and a number of performance improvements. mu4e, the Emacs frontend, has been given many UI improvements, more powerful extensibility, and much-improved documentation.
Release Notes: This release supports larger amounts of email and improves non-Latin support. Mu4e (the Emacs frontend) now support address autocompletion based on the hottest addresses in your mail corpus, richtext email with org-mode, navigation through all queries, narrowing of search results, support for inline images, and more.
Release Notes: This release has some important improvements for the core system and major new features for mu4e, the emacs frontend. The latter now allows for arbitrary user-defined actions for messages or attachments, marking threads, and regexp-marking. International (non-Latin) searching is much better supported now.
Release Notes: This release adds a number of fixes and new features, including better support for GMail, better documentation, and portability fixes for older Linux and FreeBSD systems. The Emacs frontend (mu4e) now supports the speedbar and has a bunch of tweaks to make the overall experience much smoother.