macOS
Homebrewverified · 100%
brew install mulocal Homebrew formula metadata
MacPortsverified · 94%
sudo port install muMacPorts ports tree · mail/mu/Portfile · source: api.github.com
brew / rank 2355
Install mu with Homebrew, apk, MacPorts, Nix, winget
Tool for searching e-mail messages stored in the maildir-format. Version 1.14.2 via Homebrew; verified 2026-06-21. Also installable with nix: nix profile install nixpkgs#mu.
install
Additional install commands
Linux
Alpine Linux apkverified · 92%
sudo apk add muAlpine Linux edge package indexes · mu · source: dl-cdn.alpinelinux.org
Nixverified · 92%
nix profile install nixpkgs#munixpkgs package indexes · pkgs/by-name/mu/mu/package.nix · source: api.github.com
Windows
Windows Package Managerverified · 92%
winget install --id Mu.Mu -eWindows Package Manager source index · Mu.Mu · source: cdn.winget.microsoft.com
overview
Package summary
Tool for searching e-mail messages stored in the maildir-format
Project links
Commands and aliases
- mu
history
Project history and usage
mu is Dirk-Jan C. Binnema's Maildir search and indexing toolkit for Unix-like systems. The project site says the first mu versions date to 2008, and presents the package as a response to large personal mail stores: index the Maildir once, then find, view, extract attachments from, and organize messages through command-line tools.
Project history
Its technical niche is the combination of fast Maildir indexing, a Xapian-backed query database, and package-shipped companion interfaces. The best-known companion is mu4e, a GNU Emacs mail client built on top of mu; the package also exposes Guile/Scheme bindings. In practice, users initialize a database for a Maildir, run `mu index` after mail is delivered by tools such as mbsync, offlineimap, or fetchmail, and query it from the `mu` CLI or from mu4e inside Emacs.
How it is used
In package-manager terms, mu sits at the intersection of mail tooling, desktop productivity, and Emacs workflows. It is packaged by several Unix-like distributions, sometimes under the name `maildir-utils`, while Homebrew and similar managers expose it as `mu`.
Sources
security posture
Risk level: green
narrow executable package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- narrow executable package without higher-risk signals
Signals
- metadata:no-higher-risk-signals
Install behavior
- No Homebrew bottle metadata was recorded.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
mu | executable | indexed executable | Discovered from the local executable index. |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-08-03
manager version1.14.2
manager updated2026-06-21
local dataunknown
upstreamnot available
latest detectednot detected
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:mu |
|---|---|
| Version | 1.14.2 |
| Package manager | Homebrew |
| Homepage | https://www.djcbsoftware.nl/code/mu/ |
| Repository | https://github.com/djcb/mu |
| Last updated | 2026-06-21T16:45:17-04:00 |
| Pulse | updated |
| Bottle | not recorded |
| Service | none declared |
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
Nix95%
mu
nix profile install nixpkgs#mu- normalized package name match
- Matched by: Mu
apk95%
mu 1.14.2-r0
Utilities for indexing and searching Maildirs
https://www.djcbsoftware.nl/code/mu/
sudo apk add mu- License: GPL-3.0-or-later
- Architecture: x86_64
- Source Package: mu
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Mu
apk95%
mu-doc 1.14.2-r0
Utilities for indexing and searching Maildirs (documentation)
https://www.djcbsoftware.nl/code/mu/
sudo apk add mu-doc- License: GPL-3.0-or-later
- Architecture: x86_64
- Source Package: mu
- normalized package name match
- Matched by: Mu
apk95%
mu4e 1.14.2-r0
Emacs-based e-mail client which uses mu as its back-end
https://www.djcbsoftware.nl/code/mu/
sudo apk add mu4e- License: GPL-3.0-or-later
- Architecture: x86_64
- Source Package: mu
- 1 dependencies
- normalized package name match
- Matched by: Mu
MacPorts95%
mu
sudo port install mu- normalized package name match
- Matched by: Mu
winget95%
Mu.Mu
winget install --id Mu.Mu -e- normalized package name match
- Matched by: Mu
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- pkg.so package database
- pkgdb category and tag curation