On 10/3/20 02:15, Ivan Kovachev via dmarc-discuss wrote:
How can DMARC validation be turned off or disabled at Office 365 for the above scenario?
Hopefully it is obvious that that is a question for Microsoft support, rather than for dmarc-discuss?
On your broader question: it is not normal for a service provider that provides MX service to decide to automatically disable protections merely on the basis that the relevant MX record in its DNS cache points somewhere else. Instead, an explicit configuration of something like a trusted relay is usually required. Given Microsoft's customer base, it would not be surprising if 365 had such a feature.
(ARC might also help if (a) Barracuda were willing to seal, and (b) Microsoft were willing to trust Barracuda's authentication and sealing process, but these are longer-term approaches.)
- Roland _______________________________________________ dmarc-discuss mailing list dmarc-discuss@dmarc.org http://www.dmarc.org/mailman/listinfo/dmarc-discuss NOTE: Participating in this list means you agree to the DMARC Note Well terms (http://www.dmarc.org/note_well.html)
