[Spambayes] RE: Yahoo's "domain keys" and spam

[Ryan Malayter]

[Bob Coe]
> Maybe I'm missing your point, but how would an ISP that uses 
> dynamically assigned IP addresses (which is pretty much all 
> of them, AFAIK) recognize compromised PCs?

By matching dial-in logs, PPPoE sessions, or even MAC addresses to IP
address reservations. 

I use DHCP on my company's network, and I can easily tell from my logs
what machine had a particular IP address at a particular point in time,
no matter if they're dial-up, VPN, or local machines.