Usually, Anne, although the spoofing-virus will plug your email address into the messages it sends, it won't alter the IP of the sender (listed in the header info) to match you. If I understand correctly, the IP generally remains that of the person with the infected machine.
Bill Holt > From: Anne Cartwright <cartwrig at aye.net> > Reply-To: macgroup at erdos.math.louisville.edu > Date: Tue, 9 Nov 2004 16:49:07 -0500 > To: macgroup at erdos.math.louisville.edu > Cc: Anne Cartwright <cartwrig at aye.net> > Subject: Re: MacGroup: bug? > > Lee, or someone else in the know about digitally signed e-mail, > > If one uses the digital signature, will this keep the spoof from being > sent or just notify the receiver that it was from you? Also ow would > one know it was really from you and not just from someone else with a > digital signature or photo that looks like > ? > > Anne Cartwright > > > On Tuesday, November 9, 2004, at 01:01 PM, Lee Larson wrote: > >> On Nov 9, 2004, at 12:05 PM, S. Blake smelled something: >> >>> Something fishy is going on here, but I don't know what. This >>> "sender" copied my e-mail address. I have also gotten a bounce-back >>> that I was supposed to have sent to someone in my address book-- but >>> with the prefix 3D. >> >> You can probably thank one of your Windows-using friends for this. >> There are several worms and viruses on Windows that search the >> infected machine for e-mail addresses. When it finds your address, it >> sends out an infected e-mail that looks like it came from you. >> >> There are also spammers who use this technique. >> >> This is why some of us champion digitally signed mail. If everyone >> signed their mail, this type of spoofing would go away because we >> could just throw away mail that wasn't signed. The spoofing program >> cannot duplicate your signature.<smime.p7s> | The next meeting of the Louisville Computer Society will | be November 23. The LCS Web page is <http://www.kymac.org>. | List posting address: <mailto:macgroup at erdos.math.louisville.edu> | List Web page: <http://erdos.math.louisville.edu/macgroup>
