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postfix-devel: Re: postscreen - adding reverse-name resolve

Re: postscreen - adding reverse-name resolve

From: Tomoyuki Murakami <tomoyuki_at_nospam>
Date: Mon Dec 13 2010 - 15:34:20 GMT
To: wietse@porcupine.org

>> a limited time slot of ~350 ms. is too short for resolving
>> reverse-names.
>> Contrary, If there are time to wait for completion, 95% would
>> gets results within 1.4 sec. from my observation.
>
> So you want postscreen to wait 1.4 seconds before allowing
> a whitelisted connection to proceed? That is completely
> contrary to the design principle, which is to minimize
> delays for legitimate email.

No, Whitelisted IPs both Permanent and Temporary are not required
to be resolved originally. So there should be short-cut
(cancellation) and not necessarily waiting for 1.4 sec. for them.

> I think that you need to do more research on these issues before
> I am going to spend more time arguing about this.

OK, I will try to do.
-- Tomo.