Compare software

b1gMail vs Mox: catalog facts
b1gMail	Mox
Free Free and open source under the GPL-2.0 licence.	Free Free and open source.
Web, Self-hosted	Linux, Self-hosted
Runs on shared web hosting with PHP and MariaDB Web admin panel for managing users and the service	Single program covering SMTP, IMAP and webmail Built-in DKIM, SPF, DMARC, MTA-STS and DANE
Shared-hosting mode relies on POP3 catch-all mailboxes Community site and documentation are partly in transition from the old website	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: GPL-2.0	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.