Hello everyone I have a SBS2k client who has Exchange AV that checks / scans all Email attachments. As well as having this on constantly and checking inbound / outbound Emails, should SMTP Filtering in ISA be turned on or configured? Is there a link anyone could supply that I could read up on this for the pro's or cons's Thanks everyone. Tom / Debbie I hope you are all well. Simon Weaver Technical Consultant MCSE+Internet / MCSE Windows 2000 Integrated Solutions Corp. Ltd http://www.iscl.net <http://www.iscl.net/>