I use Eudora with Earthlink as my inernet provider. Some (but not all) of my email recipients tell me that when then receive my mail, it comes with a 0KB attchment called ATT00007.txt. Is this a sign of a virus? Where does this file come from?
I've Googled the net using the filename, and it comes up a lot - indicating that it's common - but not in any context that explains what it is.