Short description of MailScan for Linux Mail Servers 6.1a: 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. MailScan works on "TCP-IP Port level" and hence does not require an additional machine to act like a gateway.