iRedMail

iRedMail assembles a complete mail server stack using Postfix for SMTP handling and Dovecot for IMAP/POP3 delivery, complemented by open‑source components such as SpamAssassin, ClamAV, SPF, DKIM, and greylisting for spam and virus protection. It provides a web‑based administration interface and optional webmail (Roundcube) and groupware (SOGo) for managing messages, filters, calendars, contacts, and mobile synchronization via CalDAV, CardDAV, and ActiveSync. The system stores user data in a chosen backend—OpenLDAP, MySQL, MariaDB, or PostgreSQL—and enforces secure connections with TLS and encrypted password storage using SSHA512 or BCRYPT.

The solution targets organizations and individuals who want to host their own email infrastructure on mainstream Linux or BSD distributions, including CentOS Stream, Rocky, Alma, Debian, Ubuntu, FreeBSD, and OpenBSD. It is positioned for users needing unlimited mailboxes without per‑account licensing, and who prefer full control over data privacy and server configuration.

Distinctive aspects include a reproducible, one‑click deployment process, optional Docker packaging, and a free, GPL‑3.0‑licensed codebase that can be extended or customized. Community support is available through an online forum, while professional assistance can be purchased separately.