DMARC

Tools:

• https://dmarcian.com/

Example DNS record:

_dmarc IN TXT "v=DMARC1; p=none; rua=mailto:admin@example.net; ruf=mailto:admin@example.net"

Report types:

• RUA - report type - aggregate. Comprehensive view of all of a domain's traffic.
• RUF - report type - forensic. Redacted copies of email that failed DMARC compliance.
• p - policy none, reject, quarantine
• sp - subdomain policy type none, reject, quarantine