> A sender using both SPF and DMARC will see a slight > boost in validation rates due to increased resiliency when there are > transient DNS failures and other problems.
Do you mean "both SPF and DKIM", perhaps? I don't see how that makes sense: if there's a transient DNS failure, then neither the SPF nor the DKIM (nor the DMARC) records can be retrieved. I also don't see how using an unreliable mechanism is a benefit. It demonstrably hurts validation rates related to relayed/forwarded mail, and can cause *false* validations in cases of overly-broad SPF configurations (as when a large provider that also hosts many spammers is used). Barry _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
