CMail Alternatives [Page 2]

Scriptable and scalable SMTP server and email framework designed for service providers.

KumoMTA is the world's first Open-Source MTA designed from the ground-up for large-volume senders. Get a fast, flexible, supported solution.

Open Source free

Warm up your cold email inbox, and never land in spam anymore!

Try for free freemium $9.0 / Monthly

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.

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

Open Source

A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.

Open Source

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

Open Source

Open source SMTP server written in Node.js

Open Source

Mailercloud is a cloud-based email marketing tool, enriched with great features, which help users to build strong relationships with their audience. It is ideal for those who wish to improve engagement rate and conversions.

freemium $10.0 / Monthly

An open source mailserver suite.

Open Source

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open...

Open Source

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.

GreenArrow Transactional Email provides a flexible and secure SMTP and API email delivery from application or website.

Open-Xchange Server 6 is the most advanced Linux based Groupware solution f.