[Mailman-Users] Rate limit by domain/mx

I know this isn't really a mailman issue, but I was just curious, those that need rate limiting, what are you using?

I really need this set up, we have one list in paticular that has almost 1500 AOL subscribers, which is an announce only list, but the owner sends out about 6 announcements at the same time flooding AOL with 9,000 messages, and as fast as our MTA can handle. Right now we are using sendmail 8.13.8.

Thanks -Rob