Courier IMAP

The Courier IMAP server is a fast, scalable, enterprise IMAP server that uses Maildirs.

Archiveopteryx

Archiveopteryx stores email in a database and provides access to it through IMAP and more.

ConvertKit

Email marketing software for online creators. We help you earn a living online through an intuitive email marketing automation tool.

Cyrus IMAP

The Cyrus IMAP server differs from other IMAP server implementations in that it is generally…

Dovecot

Dovecot is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with…

Emails

Simple, easy and secure mail server with a convenient and simple interface.

MailEnable

MailEnable is a Windows based mail server and email server program that is packed with the state of the features and functions like antivirus and spam filtering system, webmail management system, cardDAV, CalDAV and much more.

Mailbird

Mailbird is the best email client for Windows 7, 8 and 10

Microsoft Exchange Server

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.

PowerMTA

PowerMTA is an industrial-strength software for high-volume email delivery.

Sanwhole Exchange

Sanwhole Exchange is a server running iMail, iPress and iStore services.

Wallet

Wallet is the simplest and easiest way to keep track of and secure your most sensitive information.

Zimbra

Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

Zimbra Collaboration Suite

Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.

iRedMail

A fully fledged, free email server solution, an open source project (GPL v2).

14 Alternatives To Courier IMAP