SORBS is listing Amazon EC2's entire IP address space, causing major deliverability problems for Amazon EC2 customers.
We took a look at 9 million delivery attempts through one of our spam filters and compiled a list of the most common spam connection rejection messages.
Spammers appear to have changed their software so that it less often sends the QUIT command, as required by the RFC.
There have been reports from the Asterisk open-source PBX community that spammers are attempting to gain access to Asterisk PBX through brute-force attacks.
First IPv6 Spam Message Caught in the Wild
Amazing new exploit for Linksys routers running DD-WRT
Stats Porn Friday: How Traffic Shaping cuts out 2/3 more spam than blocking alone
Why Traffic-Shaping Uses Less Resources, Not More
Is Postfix Anvil(8) as good as it gets for spam DDoS protection?
Survey Results from Parallels Summit 2009