I am a little confused about this scene, the email sent from my domain is signed by Yahoo, thus it has a valid DKIM. But my domain itself has no DKIM setup, the message was signed by Yahoo not by my domain. Will this DKIM setting make DMARC broken?
I saw the headers from gmail as below. I am just not sure about this. Please advise, thanks. SPF: PASS with IP 106.10.242.xx Learn more <https://support.google.com/a?p=show_original&hl=en> DKIM: 'PASS' with domain yahoo.com Learn more <https://support.google.com/a?p=show_original&hl=en> DMARC: 'PASS'
