On 19/08/2010 07:54, Jeff Laine wrote: > So, the question is: do the freebsd.org maillist servers follow SPF > records or PTR record is mandatory? >
The PTR is mandatory. The vast majority of SMTP senders without proper
PTR records are zombie machines spreading spam. Anyone running a real
mail system should be capable of arranging for a correct PTR in the DNS
-- if they aren't then they have no business at the controls of a MTA.
As far as I know, the FreeBSD.org mailers don't pay much attention to
SPF -- generally the accepted practice seems to be to use SPF as part of
computing Spam scores, but not to make accept/reject decisions solely
based on SPF.
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
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