better blocking at MTA level (off-topic)

[Koopmann, Jan-Peter]

Hi,

looking at todays 88% High Scoring Spam ratio I would like to block more
at the MTA level. What are relyable RBL services (commercial is fine)
that can be used? Or other methods besides tarpitting, pipelining tricks
etc. at MTA level (which we all do) that would reduce the load? 
 
Or am I the only one suffering from massive attacks the past few days?
What are you guys using?



Kind regards

Jan-Peter Koopmann