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GNU Mailutils vs mblaze: catalog facts
GNU Mailutils	mblaze
Free Free and open source under the GPL-3.0-or-later license.	Free Free, with the source code published on GitHub.
Linux, Command line	macOS, Linux, Command line
Works with local and remote mailbox formats Includes mail reading, retrieval and filtering utilities	Small composable commands that work in shell pipelines Works directly on standard Maildir folders
Primarily a command-line and server-side package Library components are aimed at developers integrating mail handling	No graphical or full-screen interface Needs a separate program to fetch and send mail
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.