Hi Ahmad, you can read about badmail folder and NDR on board (find Zoran>Goran Jovanovic messages). I use Symantec AV Enterprise Edition, that includes: AV clients, AV server, AV filter for MS exchange, SMTP gateway for scanning messaging traffic, web filter... Also you have Panda, Kaspersky and more. Find what you need and what can buy on the Internet. Than you can ask about 'how to configure what', although you will receive manuals whit all these products. Zoran