On Tue, 2012-07-17 at 11:19 -0400, Chris Knadle wrote: > > * Recipient address rejected: Greylisted for 2 minutes > > ... > > Probably DNS, RDNS or SPF issue. right or wrong ? > > I don't think this is RDNS or SPF is related.
It might be. Any half-sane greylisting implementation will have to have some *reason* for greylisting the messages. Lack of reverse DNS is certainly something that triggers greylisting on my systems. You could also imagine people using SPF as a trigger — either an SPF failure causing greylisting to happen, or an SPF 'pass' causing it to be avoided. It's one of the few things that SPF might actually be useful for. -- dwmw2
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