DMARC adkim= and aspf=

How strictly the SPF and DKIM domains must match the From domain. Check any domain's DMARC record below.

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Examples:

DMARC Checker

What adkim= and aspf= does

Tagadkim= and aspf=
MeaningHow strictly the SPF and DKIM domains must match the From domain
Example Recordv=DMARC1; p=quarantine; rua=mailto:[email protected]; adkim=r; aspf=r
Lives At_dmarc.yourdomain (TXT)

How strictly the SPF and DKIM domains must match the From domain.

Relaxed (r, the default) accepts subdomains; strict (s) needs an exact match. Relaxed is right for most domains.

DMARC Tags and Policies

Questions

What does DMARC adkim= and aspf= mean?
How strictly the SPF and DKIM domains must match the From domain.
How do I check a domain's DMARC policy?
Enter the domain above, or run dig +short TXT _dmarc.example.com.

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