SoBig.F Virus

Like many others, I got slammed by the SoBig.F email virus. But not because my system was infected (my server filters out many potentially virus-laden attachments). I got hit because the virus forged the from address as one of my addresses. Like the Cnet article says, "The address is also spoofed and may not indicate the true identity of the sender." So I got hit with bounces from systems that think I sent the virus. I noticed that many of the bounces were coming from the same IP address, so I blocked it from my mail server. But other systems sent bounce-messages, and there's really no way to prevent this from happening. So even though I follow fairly good virus-protection practices—and my system isn't infected in any way—I still have to deal with the effects.