Domain check / DMARC
<DMARC>Domain-based Message Authentication, Reporting and Conformance
DMARC tells recipients how to handle your domain. Is the sender genuine? Then your email arrives properly. Does something not check out? Then misuse is stopped. That way you stay in control of who can send email on behalf of your domain, and you improve the delivery of your own messages.
<how it should be>
DMARC in order
- There is a DMARC record at _dmarc.yourdomain.
- The policy is set to p=reject, or you are working towards it step by step via quarantine.
- You receive reports (rua) and actually look at them.
<the other records>