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Sympa vs mlmmj: catalog facts
Sympa	mlmmj
Free Free and open source under the GPL-2.0 licence.	Free Free and open source under the MIT licence.
Self-hosted, Command line	Self-hosted, Command line
Designed for lists with tens of thousands of subscribers Handles subscription, moderation and archives in one package	Very low resource use with no daemons Works with Postfix, Exim, qmail and sendmail
Requires running and configuring your own mail server Setup is aimed at experienced system administrators	Deliberately minimal feature set Configured from the command line and files rather than a full web admin
Self-hosted	Self-hosted
Open source	Open source
License: GPL-2.0	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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