MXRBL is shaping up to be a powerful blacklist for blocking spam. We're taking a no BS approach from both angles. No BS from us: if your mail server is listed and we have no recent spam (and it's not hosted in a known spam network), it'll be delisted on request. No BS from you: you can't trick us if you're a spammer. We have the logs.
Legal content allowed, don't be a dick.