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MDaemon Email Server vs Mailu: catalog facts
MDaemon Email Server	Mailu
Paid Commercial licence with renewals; a free 30-day trial is available.	Free Free and open source.
Windows, Self-hosted	Linux, Self-hosted
Self-hosted alternative to Exchange and Microsoft 365 Webmail, groupware and anti-spam in one package	Webmail and admin interface included Per-domain delegation and quotas
Runs on Windows only Paid licence with renewal fees	Requires Docker Releases are infrequent
Downloadable app, Self-hosted	Self-hosted
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account 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 September 24, 2026

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