mailcow review
A Dockerized mail stack for teams that want control over their own email infrastructure.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
mailcow is an open-source email and groupware suite packaged for Docker and deployed on infrastructure operated by the user. It is aimed at individuals, small businesses, and organizations that want to manage domains, mailboxes, delivery, retrieval, webmail, calendars, contacts, and security controls in one self-hosted stack. The web administration interface covers domains and mailboxes, while IMAP and POP access are provided through Dovecot. Native mobile apps are also included in the category specification, alongside integrated SOGo webmail with CalDAV and CardDAV.
Its ecosystem is a central part of the product. mailcow brings together Docker, Postfix, Dovecot, SOGo, Rspamd, ClamAV, MariaDB, CalDAV, and CardDAV rather than presenting email as an isolated mailbox component. That combination supports webmail, groupware, spam filtering, antivirus scanning, calendars, and contacts within the same deployment. DKIM and ARC support, mailbox aliases, temporary spam aliases, and migration tools extend the administrative scope. Technical teams should expect to work with a coordinated stack of services, while organizations seeking a simple hosted inbox may prefer a managed provider.
Control is another defining strength. Administrators can configure maximum message and attachment sizes, manage mailbox quotas and aliases, enable TOTP, YubiKey OTP, or WebAuthn authentication, and use tools for mailbox and server migration. The open-source, self-hosted model suits teams prepared to operate their own email infrastructure and tune the deployment around their requirements. It is less suitable for buyers who want a conventional hosted mailbox subscription with provider-managed infrastructure and a straightforward per-user plan. Choose mailcow for deployment control, groupware coverage, and configurable administration; choose an alternative when operational simplicity is the priority.
mailcow pros and cons
- Where it wins
- Dockerized suite combines mail, webmail, calendars, contacts, and administration
- Includes Rspamd, ClamAV, DKIM, ARC, and multi-method two-factor authentication
- Migration tools and configurable mailbox and attachment limits support custom deployments
- Where it doesn't
- Requires user-operated infrastructure rather than a hosted mailbox service
- Administration spans multiple interconnected mail and groupware components
- No conventional per-user subscription tiers for organizations seeking managed hosting
mailcow fact sheet, pricing and score →
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