I run a website [URL="http://www.everylist.com"]www.everylist.com[/URL] which allows people to post free classifieds in their local community. When people post a classified, I send an email to them confirming the post and telling them how to edit it. Rather than recieving the message, one of my users recieved a warning that I had sent an Outlook Express virus. Given that the system is unix using sendmail, this doesn't seem reasonable. Anyone have any suggestions?