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MailFathom CLI (mfctl) is the administrative command-line client for MailFathom, a self-hosted, AI-native mail service published by MailFathom, and is currently available in version 0.4.0 as a single listed version. Its purpose is to administer a MailFathom deployment entirely over HTTP: mfctl signs in against the deployment's administrative endpoint, keeps a separate profile for each deployment being administered, checks that a stored credential still works, and completes the OAuth authorization that a mailbox requires. Notably, it performs all of this without ever reading the service's configuration, opening its database, or touching its secret store, making it a purely remote administrative tool. The underlying MailFathom service runs on Linux, either as a container or as a native process, and works by synchronizing IMAP mailboxes into a PostgreSQL database that the operator owns, indexing those mailboxes, and serving them to AI agents over the Model Context Protocol. Because administrators manage such deployments from their own workstations, mfctl ships for Windows as well, fitting the software into the administrative and command-line tooling category for mail infrastructure management, particularly in environments where mail data is surfaced to AI agents. Typical use cases include signing in to a deployment, managing multiple deployment profiles from one client, validating that stored credentials remain functional, and completing mailbox OAuth authorization during setup or maintenance. Regarding distribution and integrity, no mfctl binary carries a code signature; instead, every release publishes a checksum file covering all binaries, and the hash in the package manifest is the one that winget verifies the download against, giving users a verifiable way to confirm that the installer they receive matches the release.
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