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Re: [milter-greylist] Greylisting Hosts Without Reverse DNS doesn't work

2016-09-07 by Marcus Schopen

Hi Mauricio,

On 2016-09-08 00:48, Mauricio Teixeira mauricio.teixeira@... 
[milter-greylist] wrote:
> I have contacted them, but that's no the point. They're not the first
> and won't be the last, and I am tired of managing an exception list. I
> want things more automated. But at the same time I don't want to have
> to remove the reverse DNS check, because that also blocks real issues.

Beside the technical problem I'm asking myself what is the benefit of an 
extra acl for not matching rDNS, especially with a longer delay than 
that for standard greylisting? If the sending host is "valid" it has 
spooling and will break through greylisting even after your 120 minutes, 
as well a sending spambot with spooling. A fire and forget sender will 
be caught by standard greylisting. So why setting a longer delay for 
misconfigured forward confirmed DNS? Which brings me to the question, 
what is a good value for delaying at all?

Ciao!
Marcus

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