greylisting?

[Kai Schaetzl]

Res wrote on Mon, 17 Apr 2006 13:36:22 +1000 (EST):

> Since enforcing PTR checks, like I said  90% of the crap is now rejected

By simply checking if a PTR record exists? You are then getting spam from 
weird locations ;-) All big German providers have PTR for their dynamic IP 
space and what I get from the big US providers like charter, comcast, shaw 
and such, they all have PTR. Actually that's a good thing since I can 
block them all by domain instead of collecting their IP ranges :-)
I could reject maybe 10% by a "need PTR" policy - if I'm lucky.

Kai

-- 
Kai Schätzl, Berlin, Germany
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