DMARC for subdomains and domains that do not send email
The sp and np tags, and why a domain that sends no mail still needs DMARC. How to lock down subdomains and parked domains so nobody can spoof them.
Read postThe sp and np tags, and why a domain that sends no mail still needs DMARC. How to lock down subdomains and parked domains so nobody can spoof them.
Read postDMARCbis swaps the Public Suffix List for a DNS Tree Walk to find your policy, capped at eight queries. What that changes, and why your subdomains need their own records.
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