Free DNS helpers

DMARC record generator

Create a _dmarc TXT record. Start with p=none for monitoring, then tighten policy when reports look healthy.

Policy (p)

Percentage (pct)

Aggregate reports (rua) — email or mailto:address

Forensic reports (ruf) — optional

Subdomain policy (sp)

adkim

aspf

Generated record

Publish as a TXT record at _dmarc.yourdomain.com

v=DMARC1; p=none; adkim=r; aspf=r