mailcow
About mailcow
Open-source, Docker-based email server suite bundling Postfix (MTA), Dovecot (IMAP/POP3), Rspamd (spam filtering), SOGo (groupware/webmail), ClamAV (antivirus), and an integrated admin UI into a single self-hosted deployment. Provides DKIM, SPF, DMARC, ARC signing, DANE/TLSA, rate limiting, quarantine management, and per-domain/per-mailbox policy controls out of the box. Active open-source community with frequent releases on GitHub. Popular with self-hosters, ISPs, and MSPs seeking full-stack mail infrastructure without vendor lock-in.
Why Notable
Open-source Docker-based full mail stack; bundles Postfix, Dovecot, Rspamd, SOGo, ClamAV; built-in DKIM/SPF/DMARC/ARC/DANE; active GitHub community; popular with self-hosters and ISPs
