Ian J. Kennedy

West Midlands

Systems Administrator

Blocking incoming connections on port 25 would stop open mail relays, not the Zombie PCs. ISPs should be prepared to suspend or cancel the Internet accounts of customers of PCs infected with Viruses or Trojans. If you receive an email infected with a virus, look at the "Received From" lines in the message headers. Trace the responsible ISP using a "whois" lookup on the IP address and forward the email, complete with all the header information to them.
Maybe if enough of us start complaining they'll take some responsibility for educating their customers!