Kerio Mail Server is a secure, high-performance, multi-domain, mail server working with all POP3 and IMAP desktop mail clients for Windows, Linux and Mac, and since it is a separate application, any problems can be dealt with without having to disrupt the actual server OS. It has dual anti-virus control - you can use the integrated McAfee antivirus scanner or an external product from (Avast, AVG, eTrust, NOD32, Sophos, Symantec). Anti-spam is provided by content-based SpamAssasin and sender-based anti-spam tools There are two web-based clients (one looking like Outlook, the other for PDAs) for webmail allowing you to access your e-mail from any Mac/PC with internet access.

Kerio