MailScanner supports a number of AV programs, and also manages the configuration of them for you. It also is excellent in stopping spam. MailScanner does require a little configuration, but the documentation on how-to do it is great. I have been using MailScanner for about 3 years now, and have no problems with. I recommend you get MailScanner installed. Once you have it installed, you can look at the list of AV programs it supports. (Both commercial and open source) I am current running clamav f-prot and bitdefendor. (all open source) Before you ask why use more then one AV program to scan mail, there is a lot of good information on reputable security sites that suggest this is the best approach to prevention. Lastly, I recommend you use the installer that has been developed for clamav and spam assassin to install these programs because it has been developed to configure the 2 programs for you for the best performance with MailScanner. Steve Dawes Phone: (403) 268-5527 Email: SDawes at calgary.ca NOTICE - This communication is intended ONLY for the use of the person or entity named above and may contain information that is confidential or legally privileged. If you are not the intended recipient named above or a person responsible for delivering messages or communications to the intended recipient, YOU ARE HEREBY NOTIFIED that any use, distribution, or copying of this communication or any of the information contained in it is strictly prohibited. If you have received this communication in error, please notify us immediately by telephone and then destroy or delete this communication, or return it to us by mail if requested by us. The City of Calgary thanks you for your attention and co-operation.