I’ve been tinkering in my spare time with setting up a killer mailserver; something that will hopefully fend off spam with great accuracy, yet never at the expense rejecting legitimate mail. One great weapon in the fight has always been Spamhaus, which runs a series of extremely high-quality blacklists.
It turns out that they’ve recently launched their DBL, or Domain Block List, a form of RHSBL, allowing you to query domains for spamminess instead of looking up IPs. There’ve been a bunch of lists offering this, but DBL should bring the usual Spamhaus professionalism to the table. Yay!