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Modoboa vs Mox: catalog facts
Modoboa	Mox
Free Free and open source, self-hosted.	Free Free and open source.
Linux, Self-hosted	Linux, Self-hosted
Simplified web UI lowers the barrier to running a full mail platform Open source and self-hosted, keeping mail data under your control	Single program covering SMTP, IMAP and webmail Built-in DKIM, SPF, DMARC, MTA-STS and DANE
Requires a Linux server to install and maintain Smaller community than some larger self-hosted mail projects	Younger and less widely deployed than Postfix and Dovecot Deliverability still depends on your IP reputation and DNS
Self-hosted	Self-hosted
Open 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 September 22, 2026	Official website Full listing and sources Checked September 24, 2026

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