Email Server

Composable all-in-one mail server and MTA.

Classic Unix mail transfer agent used in many enterprise environments.

Simple yet full-featured Docker-based mail server. Includes SMTP, IMAP, webmail, anti-spam, antivirus, and admin interface.

Open-source IMAP and POP3 email server. High performance, standards-compliant, secure. Supports maildir and mbox formats.

Apache modular mail server platform written in Java.

Web-based management interface for Postfix virtual domains and mailboxes. Manage domains, aliases, quotas, and vacation auto-replies.

Fast, secure, and easy-to-administer mail transfer agent. Default MTA on many Linux distributions. Handles millions of messages per day.

One-click email server deployment. Sets up SMTP, IMAP, spam filtering, DNS, and webmail on a single Ubuntu server. Self-hosted Gmail replacement.

Modern all-in-one mail server supporting JMAP, IMAP, and SMTP.

Mature, widely-deployed open-source spam filter. Uses diverse range of tests including header analysis, Bayesian filtering, and DNS blocklists.

Free implementation of the SMTP protocol from OpenBSD.

Highly configurable mail transfer agent for Unix systems.

Collaboration suite with email, calendar, and contacts.

Full-featured mail server solution. Postfix, Dovecot, SpamAssassin, ClamAV, and web admin. Supports MySQL, PostgreSQL, OpenLDAP backends.

Mail hosting made simple. Modern web interface for managing email domains, accounts, and aliases. Built-in webmail, calendar, and contacts.

Free, open-source IMAP webmail client with a desktop-like user interface. Drag-and-drop, MIME support, address book, folder management.

High-performance SMTP server written in Node.js.

Docker-based mail server suite. Includes Postfix, Dovecot, SOGo groupware, ClamAV, Rspamd, and web admin. Full-featured out of the box.