DMARC Builder

Build DMARC records interactively with live preview and policy explanation.

Policy (p)

Subdomain policy (sp)

Percentage (pct)

Report interval (ri, seconds)

Aggregate reports (rua)

Forensic reports (ruf)

Failure options (fo)

DKIM alignment

SPF alignment

Valid

v=DMARC1; p=none; fo=0

v: Version — must be DMARC1.
p: Policy for the organizational domain. Monitor only — no action taken on failing messages.
sp: Policy for subdomains (inherits p when omitted). Monitor only — no action taken on failing messages.
pct: Percentage of messages subject to the policy.
rua: Aggregate report destination addresses.
ruf: Forensic (failure) report destination addresses.
fo: Failure reporting options (0, 1, d, s).
adkim: DKIM alignment mode (r=relaxed, s=strict).
aspf: SPF alignment mode (r=relaxed, s=strict).
ri: Reporting interval in seconds.

Monitoring policy without rua — you will not receive aggregate reports.