Free Developer Utility

Free Email DNS Checker: SPF, DKIM, DMARC & MX

Check a domain's MX, SPF, DKIM and DMARC records in real time using public DNS-over-HTTPS. Enter an email address to check its format and its domain's records. Diagnose deliverability and authentication issues instantly.

Tired of configuring DNS manually?

Sently gives you the exact DKIM, SPF and DMARC records for your domain, checks them for you automatically, and keeps each client's domains separate.