AntiVirus for MDaemon 

AntiVirus for MDaemon offers total email protection and an unsurpassed ability to detect, detain and delete infected Emails. AntiVirus checks daily for signature file updates and free urgent update notifications concerning new serious threats.
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netMailshar 

netMailshar is an easy-to-use, powerful mail server that enables every computer in an office to send and receive email not only across the Internet but also within a LAN. It provides centralized, generic protection against all email viruses.
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