On Monday, July 23, 2012 11:58:58, David Woodhouse wrote: > 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.
The two greylisting implementations I'm familiar with, greylistd and postgrey, don't seem to have any configuration options related to RDNS or SPF. As far as I can tell they both operate solely on whether there is already an entry for the sender emailing the recipient, otherwise a temporary rejection is done to force the sending mailserver to retry. There are configuration options for the minimum wait time for accepting a retry and the length of time to hold greylist entries before they expire. -- Chris -- Chris Knadle [email protected] -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
