iRedMail review 2026: an in-depth look at this open-source mail server installer, its architecture, editions, pricing and top self-hosted alternatives.
iRedMail solves a specific, long-standing sysadmin problem: standing up a secure, full-featured mail server from open-source parts normally requires manually integrating a dozen separate projects -- an SMTP daemon, an IMAP server, a spam filter, an antivirus scanner, a webmail client and an authentication backend -- each with its own configuration quirks and security pitfalls. iRedMail packages that entire stack into a single guided installer script that produces a working, secured mail server in minutes rather than days.
Started in 2007 by developer Zhang Huangbin, the project has been continuously maintained for nearly two decades and supports a wide range of Linux and BSD distributions, making it one of the longest-running self-hosted mail server projects still in active development.
The base installer and resulting server are fully open source and free under GPLv3, with the project's commercial layer limited to an optional, more advanced admin panel and an optional managed-deployment support service, rather than gating the mail server itself behind a paywall.
iRedMail's core stack pairs Postfix for SMTP with Dovecot for POP3/IMAP, backed by the administrator's choice of OpenLDAP, MySQL/MariaDB, or PostgreSQL for storing domains, users and mailing lists, giving organizations flexibility to match their existing directory infrastructure. On top of that base, Roundcube webmail and the SOGo groupware suite provide browser-based email, plus CalDAV/CardDAV calendars and contacts and ActiveSync for syncing with mobile devices.
Security is handled through a layered stack: Amavisd, SpamAssassin and ClamAV filter spam and malware, OpenDKIM and SPF authenticate outbound mail, Fail2ban blocks brute-force login attempts, and iRedAPD enforces custom Postfix sender/recipient policies. All client connections are forced over TLS by default, and captured spam is routed into a quarantine rather than silently dropped.
For administrators who need more than the bundled free admin panel offers, iRedAdmin-Pro adds features like per-domain reporting, advanced mailbox quota management, and a more polished management UI, while iRedMail Easy provides a hosted deployment assistant that walks less experienced users through provisioning and maintaining their own self-hosted server.
The core iRedMail installer, and the full mail server it produces (unlimited domains, users, and mailing lists on Postfix, Dovecot, Roundcube/SOGo and the full anti-spam/antivirus stack) is completely free and open source under GPLv3, with no license fee for self-hosting on the administrator's own server.
Two optional paid products sit on top: iRedAdmin-Pro, the advanced admin panel, is sold as a license with a reported renewal fee around $250 per year for continued updates, and iRedMail Easy, a hosted setup and support platform aimed at less technical administrators, runs about $499 per year or $49 per month on a 12-month plan. Neither product is required to run a fully functional iRedMail server -- they exist purely to simplify administration or provide additional support for organizations willing to pay for it.
Yes, the core iRedMail installer and the mail server it deploys are free and open source under GPLv3. Optional paid add-ons, iRedAdmin-Pro and iRedMail Easy, are available for advanced administration and managed support.
iRedMail installs Postfix for SMTP, Dovecot for POP3/IMAP, Roundcube and/or SOGo for webmail and groupware, and SpamAssassin, ClamAV, Amavisd, SPF and OpenDKIM for anti-spam and security.
iRedMail supports CentOS Stream, Rocky Linux, AlmaLinux, Debian, Ubuntu, FreeBSD and OpenBSD.
iRedMail was created by developer Zhang Huangbin in November 2007 and has been actively maintained since.
Yes, when installed with the SOGo groupware component, iRedMail supports CalDAV calendars, CardDAV contacts and ActiveSync for mobile devices.
iRedAdmin-Pro is an optional, paid, full-featured web administration panel for iRedMail that adds advanced quota management and reporting beyond the free bundled admin panel.