PUBLIC DNS
Look up a DKIM selector.
Resolve selector._domainkey for a domain and show the public DKIM TXT or CNAME.
DKIM keys live under a selector hostname. The selector cannot be guessed from the root domain.
A published key does not prove a given message was signed or that DKIM aligned. For a scored MailerZ readiness scan across MX, leftover routes, SPF, DKIM, and DMARC, use Troubleshooting.
Open the full DNS diagnostic · Simulate a route in the Email Routing Lab
Cited standard: RFC 6376
DKIM keys live under a selector hostname. The selector cannot be guessed from the root domain.