Re:Outlook.com Is Quietly Rejecting Email from Domains Witho...
by jared_stewart on Sunday November 08, 2026 @05:01PM
(#50417826)
Yes, this is an older announcement from last year. Yahoo and Google did the same at that time.
The failure associated with that announcement is different. It is 5.7.515.
This new failure mode is "5.7.1 Message rejected: Message lacks SPF/DKIM/DMARC Auth Records (AS9031519)", I haven't seen any formal announcement on my end. The important thing to know about 5.7.1 is that it represents a few different failure modes, the AS9031519 is the important bit and it indicates that the domain lacks a DMARC record.
The failure associated with that announcement is different. It is 5.7.515.
This new failure mode is "5.7.1 Message rejected: Message lacks SPF/DKIM/DMARC Auth Records (AS9031519)", I haven't seen any formal announcement on my end. The important thing to know about 5.7.1 is that it represents a few different failure modes, the AS9031519 is the important bit and it indicates that the domain lacks a DMARC record.