Cyrus IMAP

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

17 Alternatives To Cyrus IMAP

Archiveopteryx

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

Courier IMAP

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

Cypht

All your E-mail, from all your accounts, in one place. Cypht is like a news reader, but for E-mail.

Dovecot

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

Exim

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
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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.

Microsoft Exchange Server

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

OBM

OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices.
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Postbox

The Power Email App for busy professionals, like you.

SendInBlue

Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.

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.
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Zoho One

Zoho is an all-in-one online office suite.
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eM Client

eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.

iRedMail

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

qmail is the name of an advanced level of mail transfer agent for the UNIX based operating systems.