MailerQ is a high performance Mail Transfer Agent (MTA) and a very fast SMTP server, designed to deliver large volumes of email messages at very high speeds. MailerQ is based on RabbitMQ AMQP.
Cost / License
- Paid
- Proprietary
Platforms
- Linux

Exim is described as 'Message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet' and is a Mail Server in the online services category. There are more than 10 alternatives to Exim for a variety of platforms, including Linux, Self-Hosted, BSD, Mac and Windows apps. The best Exim alternative is Postfix, which is both free and Open Source. Other great apps like Exim are Mail-in-a-box, KumoMTA, Haraka and OpenSMTPD.
MailerQ is a high performance Mail Transfer Agent (MTA) and a very fast SMTP server, designed to deliver large volumes of email messages at very high speeds. MailerQ is based on RabbitMQ AMQP.

NikaMail is a portable, extendable, zero-config email server. It is designed to perform automation tasks, provide access to mailboxes (port 110), serve as a mail transfer agent (port 587) and mail exchange service (port 25). NikaMail supports TLS.




EmailSuccess, an advanced SMTP Server (MTA) built from the ground up to handle the most critical reliability, performance, security, and deliverability requirements.




A lightweight mail server with SMTP and POP3 support. It mainly used as store-and-forward mail server with POP access to spooled messages or it can be used as a personal internet mail server.
