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# Welcome to mu!
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< img src = "mu.jpg" align = "right" margin = "10px" /> With the *enormous* amounts of e-mail many people
gather and the importance of e-mail messages in our daily work-flow, it is very important to be able
to quickly deal with all that - in particular, to instantly find that one important e-mail you need
right now.
For that, *mu* was created. *mu* is a tool for dealing with e-mail messages stored in the
[Maildir ](http://en.wikipedia.org/wiki/Maildir )-format, on Unix-like systems. *mu* 's main purpose is
to help you to find the messages you need, quickly; in addition, it allows you to view messages,
extract attachments, create new maildirs, ... See the [mu cheatsheet ](cheatsheet.html ) for some
examples. Mu's source code is available [in github ](https://github.com/djcb/mu ), and there is the
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[mu-discuss ](http://groups.google.com/group/mu-discuss ) mailing list.
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*mu* includes an emacs-based e-mail client (`mu4e`), a simple GUI (`mug`) and bindings for the
Guile/Scheme programming language.
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## Features
- fast indexing for [Maildir ](http://en.wikipedia.org/wiki/Maildir ), Maildir+ and Maildir-on-VFAT
- search for messages based on the sender, receiver, subject, date-range,
size, priority, words in message, flags (signed, encrypted, new, replied,
has-attachment,...), message-id, maildir, tags, attachment (name,
mime-type, text) and more
- support for encrypted and signed messages
- command-line tools for indexing, searching, viewing, adding/removing
messages, extracting attachments, exporting/searching address lists,
creating maildirs, ...
- accent/case normalization - so *angstrom* matches *Ångström*
- can be integrated with other e-mail clients such as
[mutt ](http://www.mutt.org/ ) and
[Wanderlust ](http://www.emacswiki.org/emacs/WanderLust ).
- [mu4e ](mu4e.html ), an emacs-based e-mail client based on `mu` (see screenshot).
- [mu-guile ](mu-guile.html ):
[guile 2.0 ](http://www.gnu.org/software/guile/ ) bindings that
allow for scripting, advanced processing of your data, and doing
all kinds of statistics
- fully documented (man pages, info pages)
## News
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### 2021-07-27: mu/mu4e 1.6 is available
A new release is available; [release notes ](https://github.com/djcb/mu/releases/tag/1.6 ) and
grab the [tarball ](https://github.com/djcb/mu/releases/download/1.6.10/mu-1.6.10.tar.xz ) (latest 1.6.x release).
### 2020-04-18: mu/mu4e 1.4 is available
A new release is available; [release notes ](https://github.com/djcb/mu/releases/tag/1.4 ) and
grab the [tarball ](https://github.com/djcb/mu/releases/download/1.4.15/mu-1.4.15.tar.xz ) (latest 1.4.x release).
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### 2019-04-07: mu/mu4e 1.2 is available
A new release is available; see the [release notes ](https://github.com/djcb/mu/releases/tag/1.2 ) and
grab the [tarball ](https://github.com/djcb/mu/releases/download/1.2/mu-1.2.0.tar.xz ).
### 2018-02-03: mu/mu4e 1.0 is available
After a decade of development, mu 1.0 is available. Read
[NEWS ](https://github.com/djcb/mu/blob/v1.0/NEWS.org ) with all the details.
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### 2016-12-05: mu/mu4e 0.9.18 is available
mu 0.9.18 offers a number of improvements across the board. For
example, people with huge maildirs can use a special "lazy-checking"
mode to speed up indexing; it's now possible to view rich-text message
in an embedded webkit-view, and the release adds support for org-mode
9.x. There also many small fixes and tweaks in mu4e, all based on
user-feedback.
For all the details,
see: [NEWS.org ](https://github.com/djcb/mu/blob/0.9.18/NEWS.org ).
Get it from the [Release page ](https://github.com/djcb/mu/releases ).
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### 2016-01-21: mu/mu4e 0.9.16 is here, and it is our latest stable release!
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#### Better behaviour and context handling
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- Context Handling just got smart: new ‘ ’
- Improved behaviour in html and messages marks: ability to toggle between html and text display of messages & better management of messages marked as read or unread.
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#### User Interface improvements
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- Numerous improvements in threads view and mailing lists management
- Fancy characters can now be properly used as well as special customizations for message views
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#### Faster Indexing and message management
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- Indexing & caching optimizations
You can grab the tarball directly
[from Github ](https://github.com/djcb/mu-releases ) or wait a bit to
get it through your distribution channels (details may vary from one
distribution to another).
None of this would be possible without a team of dedicated
individuals: Adam Sampson, Ævar Arnfjörð Bjarmason, Bar Shirtcliff,
Charles-H. Schulz, Clément Pit--Claudel, Damien Cassou, Declan Qian,
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Dima Kogan, Dirk-Jan C. Binnema, Foivos, Foivos S. Zakkak, Hinrik Örn
Sigurðsson, jeroen tiebout, JJ Asghar, Jonas Bernoulli, Jun Hao,
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Martin Yrjölä, Maximilian Matthé, Piotr Trojanek, prsarv, Thierry
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Volpiatto, Titus von der Malsburg (and of course all people who
reported issues, provided suggestions etc.)
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We hope you will enjoy this release as much as we do. Happy Hacking!
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-- The mu/mu4e Team
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## Old News
- 2015-09-24: After almost 6 months, a new release of mu/mu4e. We are
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happy to announce mu and mu4e 0.9.9.13! have just been
released. The following key features and improvements have been
added:
* Change the way the headers are displayed and sorted
* Fancy characters now enabled distinctively both for marks and
headers
* Composing a message is now possible in a separate frame
* Ability to display the subject of a thread only on top of it for
enhanced clarity
* Lots of bugs squashed, updates to the documentation (BDDB), as
well as embedding the News file inside mu4e itself.
- 2013-03-30: released [mu-0.9.9.5 ](http://code.google.com/p/mu0/downloads/detail?name%3Dmu-0.9.9.5.tar.gz ); full with new features and bug
fixes –
thanks to all who contributed!
- 2012-10-14: released [mu-0.9.9 ](http://code.google.com/p/mu0/downloads/detail?name%3Dmu-0.9.9.tar.gz ); a new barrage of fixes and
improvements – NEWS ](https://github.com/djcb/mu/blob/master/NEWS ). Also, note the
[mu4e-manual ](http://code.google.com/p/mu0/downloads/detail?name%3Dmu4e-manual-0.9.9.pdf ) (PDF).
- 2012-07-01: released [mu-0.9.8.5 ](http://code.google.com/p/mu0/downloads/detail?name%3Dmu-0.9.8.5.tar.gz ); more fixes, improvements (see
the link).
- 2012-05-08: released
[mu-0.9.8.4 ](http://code.google.com/p/mu0/downloads/detail?name%3Dmu-0.9.8.4.tar.gz )
with even more improvements (the link has all the details)
- 2012-04-06: released
[mu-0.9.8.3 ](http://code.google.com/p/mu0/downloads/detail?name%3Dmu-0.9.8.3.tar.gz ),
with many improvements, fixes. See the link for details. *NOTE* :
existing `mu` and `mu4e` users are recommended to execute `mu
index --rebuild` after installation.
- 2012-03-11: released
[mu-0.9.8.2 ](http://code.google.com/p/mu0/downloads/detail?name=mu-0.9.8.2.tar.gz ),
with a number of fixes and improvements, see the link for the
details.
- 2012-02-17: released
[mu-0.9.8.1 ](http://code.google.com/p/mu0/downloads/detail?name%3Dmu-0.9.8.1.tar.gz ),
which has a number of improvements to the 0.9.8 release: add mark
as read/unread, colorize cited message parts, better handling of
text-based message parts, documentation fixes, documentation
updates and a few fixes here and there
- 2012-02-09: moved the mu source code repository
[to Github ](https://github.com/djcb/mu ).
- 2012-01-31: finally,
[mu-0.9.8 ](http://mu0.googlecode.com/files/mu-0.9.8.tar.gz ) is
available. It comes with an emacs-based e-mail client,
[mu4e ](file:mu4e.html ), and much improved
[guile bindings ](file:mu-guile.html ). Furthermore, It adds
search for attachment mime type and search inside any text part
of a message, more tests, improvements in many parts of the code.
- 2011-09-03: mu 0.9.7 is now available; compared to the -pre
version there are a few small changes; the most important one is
a fix specifically for running mu on MacOS.
- [Old news ](file:old-news.org )
## Development & download
< a href = "mu4e-splitview.png" border = "0" > < img src = "mu4e-splitview-small.png" align = "right" margin = "10px" / > < / a >
Some Linux-distributions already provide pre-built mu packages; if
there's no packagage for your distribution, or if you want the
latest release, you can [download mu source packages ](http://code.google.com/p/mu0/downloads/list ) from Google
Code. In case you find a bug, or have a feature requests, please
use the [issue tracker ](https://github.com/djcb/mu/issues ).
If you'd like to work with the mu source code, you can find it [in Github ](https://github.com/djcb/mu );
also, see the notes on [HACKING ](https://github.com/djcb/mu/blob/master/HACKING ) the mu source code.
There's also a [mailing list ](http://groups.google.com/group/mu-discuss ).
## License & Copyright
*mu* was designed and implemented by Dirk-Jan C. Binnema, and is Free
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Software, licensed under the GNU GPLv3
