Email Deliverability Checker

Enter a domain or email address. We'll check MX, SPF, DKIM, and DMARC records and give you a deliverability score with actionable fixes.

WHAT WE CHECK

MX Records — mail servers that receive email for the domain
SPF — which servers are authorized to send email
DKIM — cryptographic signature proving email authenticity
DMARC — policy for handling emails that fail SPF/DKIM

POPULAR CHECKS

gmail.com outlook.com protonmail.com hey.com fastmail.com

API ACCESS

Free JSON API: GET /api/check/example.com

Returns the full analysis as JSON. No authentication needed for now.