Coherent Mail Gateway

Coherent Mail Gateway is an SMTP and POP3 software whose focus is on providing an easy-to-set-up email server experience. The software aims to combat spam by utilizing greylisting through its SMTP daemon, which ensures that only legitimate emails are delivered. Additionally, the product carries out several verifications from the SMTP client to validate the authenticity of sender-related information such as server name, any fraudulent claims, and authentication will lead to immediate disconnection.

The program has also incorporated grey, black, and white-listing functionalities in addition to optional support for ClamAV and Spamhaus. Coherent Mail Gateway's primary target market is users with static IP addresses. Although it can be used by anyone, its functionality is limited to outgoing email for those without a static IP address.

Coherent Mail Gateway requires at least a Perl 5.8.0 set up, and it has several new features. For example, the SMTP server bans persistently abusive IPs dynamically for a specified period. The performance of the platform is also improved, and users can be offered passwords to relay email remotely.

Overall, Coherent Mail Gateway is an ideal software for users seeking a simple and efficient SMTP and POP3 experience that guarantees the authenticity and delivery of incoming emails while combating spam. It's an excellent choice for anyone with a static IP address and a reliable email server.