MailScan for Linux is a reliable web based 'Real-Time' mail scanning
Software for Linux Mail Servers and performs Spam filtering and virus
scanning. It offers a complete and secure security solution for mail
servers running on Linux. Some of the Linux mail servers that it
protects are: SendMail, Qmail, Exim,
PostFix, etc.
Please use below URL:
http://www.escanav.com/english/content/products/smb/mailscanforlinux.asp