At 8:53 AM -0500 3/7/03, Bill Yerazunis wrote:
I know of at least one ISP (and I'm sure there are others) that do this. He blocks based on bounces. As soon as he blocks an IP, another one starts sending him the spam. This goes on for thousands of IPs.When the fraction I/P for any SMTP sender exceeds the administrative parameter P, the offending IP host may be automatically subjected by the MTA software to the following sanctions: