mfctl administers a MailFathom deployment over HTTP. It signs in against the deployment's administrative endpoint, keeps a profile for each deployment you administer, checks that a stored credential still works, and completes the OAuth authorization a mailbox needs — without ever reading the service's configuration, opening its database, or touching its secret store.
MailFathom itself runs on Linux, as a container or as a native process, and synchronizes IMAP mailboxes into a PostgreSQL database you own, indexes them, and serves them to AI agents over the Model Context Protocol. mfctl is the client you administer such a deployment from, which is why it ships for Windows as well.
No mfctl binary carries a code signature. Every release publishes a checksum file covering all of them, and the hash in this manifest is the one winget verifies the download against.
Technical details
Publisher
MailFathom
Author
Krzysztof Kasprowicz
Version
0.4.0
Release date
2026-08-08
License
Apache-2.0
Installer type
portable
Architecture
x64, arm64
Package ID
MailFathom.mfctl
Install MailFathom CLI from the command line
Install with Windows Package Manager
winget install --id=MailFathom.mfctl -e
Update to the latest version
winget upgrade --id=MailFathom.mfctl -e
Uninstall
winget uninstall --id=MailFathom.mfctl -e
MailFathom CLI adds this command to the command line: mfctl.
Yes. MailFathom CLI is free and open-source software released under the Apache-2.0 license.
What is the latest version of MailFathom CLI?
The latest version is 0.4.0, released on Aug 8, 2026.
Is it safe to download MailFathom CLI?
The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 24f0362c9a24dad9627550950e2ee4fffa376fdeb089b31aeb47074e04abe6db.
Which Windows versions does MailFathom CLI support?
MailFathom CLI runs on Windows and is available for 64-bit (x64), ARM64 systems.
How do I uninstall MailFathom CLI?
Open Settings › Apps › Installed apps, find MailFathom CLI and select Uninstall. From the command line, run winget uninstall --id=MailFathom.mfctl -e.
Is there a portable version of MailFathom CLI?
Yes. MailFathom CLI is available as a portable program (mfctl-0.4.0-win-x64.exe, 64-bit (x64)) that runs without installation. Copy it to any folder or USB drive and run it from there.
Alternatives to MailFathom CLI
Other Client Communication programs for Windows from different developers.
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