Based on our record, Postfix seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Read the documentation on postfix.org and/or buy one of the many available Postfix books (it really helps to understand the Postfix philosophy). Source: about 3 years ago
Bitdefender BOX - Bitdefender BOX protects all devices connected to the Internet.
iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).
ZingBox - ZingBox provides real-time IoT security solution to protect from cyber and insider threats.
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.
Bastille - Bastille provides comprehensive visibility and threat detection for IoT devices.
Exim - Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.