imap

Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.

💌 A beautiful, fast and fully open source mail client for Mac, Windows and Linux.

All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

mailcow: dockerized - 🐮 + 🐋 = 💕

Insular email distribution - mail server as Docker images

CLI to manage emails

A cross-platform .NET library for IMAP, POP3, and SMTP.

✉️ Composable all-in-one mail server.

Event-driven networking engine written in Python.

Imapsync is an IMAP transfers tool. The purpose of imapsync is to migrate IMAP accounts or to backup IMAP accounts. IMAP is one of the three current standard protocols to access mailboxes, the two others are POP3 and HTTP with webmails, webmails are often tied to an IMAP server. Upstream website is

Simple, modern & fast web-based email client

✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat

📥 An IMAP library for Go clients and servers

Mail-Archiver is a web application for archiving, searching, and exporting emails from multiple accounts. Featuring folder sync, attachment support, mailbox migration and a dashboard.

A third-party, open-source ProtonMail CardDAV, IMAP and SMTP bridge

Open-source email infrastructure for AI agents: secure inboxes, REST and MCP APIs, SMTP, human approval workflows, signed webhooks, and Python and TypeScript SDKs. Self-host with Docker and PostgreSQL.

Bichon – A lightweight, high-performance Rust email archiver with WebUI

Read/sync your IMAP mailboxes (python2) [LEGACY: move to offlineimap3]

The magma server daemon, is an encrypted email system with support for SMTP, POP, IMAP, HTTP and MOLTEN,. Additional support for DMTP and DMAP is currently in active development.

Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)