On Aug 9, 2013, at 8:28 PM, Jeff Macdonald <[email protected]<mailto:[email protected]>> wrote:
Hi all, I don't think I've seen any chatter about this on the list. If I missed it, I apologize. In the wild today, from AOL, there is this: 521 5.2.1 : (DMARC) This message failed DMARC Evaluation and is being refused due to provided DMARC Policy This has a SMTP status code that is meant for an initial connection. See http://tools.ietf.org/html/rfc1846. The extended SMTP code is meant for disabled mailboxes, which I suppose one could stretch to fit dmarc, but that seems wrong too. This doesn’t seem right to me for using with DMARC. AOL uses 521 for other anti-spam purposes as well. Has there been discussion about appropriate SMTP responses? last spec says http://tools.ietf.org/html/draft-kucherawy-dmarc-base-01#section-15.4 "550 5.7.1 Email rejected per DMARC policy for example.com<http://example.com>" but best to have a specific extended error code as 5.7.1 means a bit everything and nothing..
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