Virus scanner can prevent retransmission, storage of malicious code.
White Papers Virus Protection . There are only one or two known Linux viruses in the real world, according to Trend Micro, but that doesn't mean the operating system is exempt from malicious code. With that in mind, Trend Micro is now shipping its InterScan VirusWall 3.01 for Red Hat Linux, the most popular commercially available version of Linux. Trend Micro also is offering a free tool for Red Hat and other Linux operating systems that can scan files for malicious code. I had to have a second server in front of the Linux box just to scan mail.