What type of anti-virus protection does Message Sniffer offer?

We have an anti-virus research program of our own within Message Sniffer itself. The code rules that match malware heuristics cause result code 55. We do not use any external anti-virus programs from other companies, but it is always a good idea to have as many layers of protection as is practical. Every tool has strengths and weaknesses and multiple layers make it harder for attackers to get through.