More on Scammers Abusing TTY Services

edward ericson writes "A more comprehensive look at IP Relay scams and their effect on relay operators, the deaf, US business and the relay providers like Sprint, AT&T and MCI. Unlike a previous piece in the AZ Star, this one shows that the problem is at least a year old, and estimates that the companies have earned at least $23 million by facilitating scams. Anyone here care to discuss IP blocking techniques?" See our previous story for more.

Comments

Our method of slowly killing off spam

[Obscenity]

My family runs their own mailserver (Sendmail). There is a perl script on our server (self-made) that denies mail for a number of reasons. If a reverse DNS lookup does not work, then the mail is rejected, if the mail is in NJABHL, then the mail gets rejected. Then, if we have ever gotten spam from that IP before, the mail is rejected. If we get mail from more than one IP in a subnet, the entire subnet is blacklisted. And finally, we have a few key-words that if found in piece of mail, it will be rejected.