Understand what a DKIM selector is, where it appears in DNS, and how to verify it during an email DNS review.
Why this matters
Email DNS records are small pieces of public infrastructure, but they tell a practical story about how a domain is operated. A domain with thoughtful MX, SPF, DMARC, and DKIM records is usually easier to evaluate than one with missing or contradictory records.
What to check
- Confirm MX records point to the expected mail provider.
- Review SPF for a single clear policy and remove stale senders.
- Check DMARC policy strength and reporting readiness.
- Verify DKIM when you know the selector from the mail platform.
Recommended workflow
Start with the free Email DNS Checker for a single-domain view. For broader research, compare the domain against NewDomainData datasets so you can understand category, TLD, expiration, and market context.
Run the Email DNS Checker