Poettering's Postfix aims to be the best of its kind open source mail server. It offers many useful features such as spam filtering, virus checking, mail relaying possibility, and an integrated web interface.
Zend mail is an open source mail server. It is powerful and configuration-free. It delivers a robust set of features including anti-spam and anti-virus mechanisms, strong encryption capabilities, and customisable web-based email clients.
Sentru is yet another open source mail server from the same author of Zimbra. However, unlike Zimbra, this mail server is total free with a donation-based license. Consequently, it is a light-weight mail server with a simple interface.
Zimbra is an expensive mail server. Abbreviated as ZMS, it serves an email server solution in addition to so many useful web utilities. The OS is capable of handling high volume of email traffic and offers a robust set of features including rose, spam filtering, virus checking, plus many others.
GRCmail is a powerful and robust mail server with a graphical interface, which is very secure too. It has many features that include virus checking, anti-spam, a powerful spam filter, and so many others.
GNUMail is one of the most popular open source mail servers. It is a powerful mail server that offers an intuitive interface along with all the required functionalities. It offers the features of anti-spam, virus checking, high level of security, and much more. d2c66b5586