> I don't think you can filter "dynamics" just by using HELO checks
> in such a case it would be a better idea keeping some DNSBLs
> copies on local boxes but, again, that's up to you

Hmmm... Early HELO check here do a large part of the magic. 

About 40% of total spam blocking, definitely the single most important
filter. And the cheapest too !

Rbl is about 1/100 of HELO, and delaying 1/10. Maye we receive different
kind of spam. What are you numbers ?




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