Oof, kinda -- I was thinking of 4xx for transient resolver issues or non registered domain names, while writing the words "invalid RHS" which _would_ require a 5xx to toss out the garbage.
Read what I'm thinking, not what I'm writing! On Thu, Jun 5, 2014 at 7:03 PM, Murray S. Kucherawy <superu...@gmail.com> wrote: > 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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