Hi,

Anyone by any chance did sort of research if DENIED_IP_IN_*_RDNS helps
his users or causes more problems? I formerly thought that this is
more helpful, as IP in RDNS is most likely appear for home dsls, dialups
and other stuff not supposed to run smtp server i shall trust, and if
it's my users mail netline, then they shall authenticate while talkign 
to me anyway. But now I see that some telecoms offer dsls with static 
IPs (contrary to dyniamic one, rotated 24hs, that is addressed to home 
users) which is primarily used by companies, and therefore it's less 
likely for them to be spam source (due to botnes, zombies etc). I even 
saw a data center which named their rack hosts that way. I therefore 
think that it might be extremely useful to try to build a kind of 
database of providers who one may consider whitelisting even, they would 
otherwise fall into IP_IN_RDNS or IP_IN_CC_RDNS trap. Any thoughts?

Marcin
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