mu

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mu is a tool for dealing with e-mail messages stored in the 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, …

mu screenshot 1

Cost / License

Free
Open Source (GPL-3.0)

Application type

Email Client

Origin

Netherlands
EU

Platforms

Mac
Linux
BSD

mu screenshot 1

mu screenshot 2

mu alternatives

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0articles

Features

Command line interface
GPG Encryption
Emacs mode
Indexed search
Contacts
EMACS

Tags

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Screenshot

Secure, private email with end-to-end encryption, no ads, tracking, or government surveillance, ensuring top-notch privacy under Belgium law.

mu information

Developed by
Dirk-Jan C. Binnema
Licensing
Open Source (GPL-3.0) and Free product.
Written in
C++
Alternatives
9 alternatives listed
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Supported Languages
- English

AlternativeTo Categories

Office & Productivity, Security & Privacy, OS & Utilities

GitHub repository

1,719 Stars
410 Forks
12 Open Issues
Updated Oct 18, 2026

Popular alternatives

mu was added to AlternativeTo by Viaken on Jun 4, 2014 and this page was last updated May 12, 2024.

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Install from the command line

brew install mu

Be careful what you paste into a terminal. Check what a command installs before running it.

What is mu?

mu is a tool for dealing with e-mail messages stored in the 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, …

mu includes an emacs-based e-mail client (mu4e), a simple GUI (mug) and bindings for the Guile/Scheme programming language.