DMARC Record Generator

Build a valid DMARC record step by step

Generated Record

v=DMARC1; p=none

Add this as a TXT record for _dmarc.yourdomain.com in your DNS settings.

Policy

p=noneNone (monitor only)

Collect reports but take no action on failing mail. Good for initial deployment.

p=quarantineQuarantine

Deliver failing mail to the spam/junk folder.

p=rejectRejectRecommended

Reject failing mail outright. Strongest protection against spoofing.

Subdomain Policy

Optionally set a different policy for subdomains. If not set, subdomains inherit the main policy.

Inherit from main policy

Subdomains use the same policy as the parent domain.

sp=noneNone

Monitor only for subdomains.

sp=quarantineQuarantine

Send failing subdomain mail to spam.

sp=rejectReject

Reject failing subdomain mail outright.

Percentage

Percentage of messages the policy applies to. Useful for gradual rollout. Default is 100%.

100%

Aggregate Report Email (rua)

Email address(es) to receive aggregate DMARC reports. Separate multiple addresses with commas.

Forensic Report Email (ruf)

Email address(es) to receive forensic (failure) reports. Not all providers send these. Separate multiple with commas.

DKIM Alignment

adkim=rRelaxedDefault

The DKIM signing domain only needs to share the organisational domain (e.g. sub.example.com passes for example.com).

adkim=sStrict

The DKIM signing domain must exactly match the From domain.

SPF Alignment

aspf=rRelaxedDefault

The Return-Path domain only needs to share the organisational domain with the From domain.

aspf=sStrict

The Return-Path domain must exactly match the From domain.

Report Interval

How often aggregate reports should be sent. Default is 24 hours.

ri=36001 hour

Hourly reports. High frequency, useful during initial monitoring.

ri=4320012 hours

Twice-daily reports.

ri=8640024 hoursDefault

Daily reports. The standard default.

ri=6048007 days

Weekly reports. Lower volume but less timely.

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