On Thu, Jun 5, 2014 at 1:11 PM, Peter Blair via dmarc-discuss < dmarc-discuss@dmarc.org> wrote:
> > > I'd be curious about that "left off the domain" one; if an ISP were > already > > rejecting mail from domains that don't resolve, I doubt it would have > been > > delivered. > > +1 (again). > > It's a fairly prudent measure, rejecting mail with an invalid RHS with a > 4XX series post-DATA reply. > Do you mean 5xx? A syntactically invalid RHS doesn't seem to be something that would be corrected by a retry later. -MSK
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