2009/5/22 Ralf Hildebrandt <ralf.hildebra...@charite.de>: >> 2. Rate/Anti DNS control >> a. If IP X is seen more than 50 times in 30 minutes block it. > > Postfix can do that using anvil
I'd just like to add to that; the answer here on the list is almost always, "ANVIL IS NOT FOR DOING THAT" (whatever you think you can use it for).