On 03:04 PM 7/3/2002 -0400, it would appear that R. Scott Perry wrote: >> >The problem here is that the spammer is sending out E-mail with the >> >customer's return address. The spam is being sent from other mailservers >> >to other mailservers, so it can't be filtered. >> >>Sure, I understand the issue. >> >>But maybe you didn't read my post in-depth. The filter is on bounce >>messages that do NOT contain a local token. So it is the very *fact* that >>the original impersonation is happening on remote mailservers that makes the >>technique work! > >OK, let's try this again. :) > >I send an E-mail from my mailserver to, let's say, someone at Ipswitch. I >use your return address. > >Can you stop it? If it bounces, you can stop the bounce messages. But, >it is impossible to prevent me from sending that E-mail to someone at >Ipswitch using your return address. You can't filter E-mail you don't >have access to. <G>
I think that's the point: Filtering the bounce messages. Tyran Ormond Programmer/LAN Administrator Central Valley Water [EMAIL PROTECTED] Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit the Knowledge Base for answers to frequently asked questions: http://www.ipswitch.com/support/IMail/
