Email Security Checker
SPF, DKIM, DMARC, BIMI, MTA-STS and TLS-RPT in one graded report
Email Security Checker — Complete Guide & Instructions
A single graded report covering every email authentication standard — SPF record and policy, DKIM selector discovery, DMARC policy, BIMI, MTA-STS and TLS-RPT — with a 0–100 score and raw records for verification.
How to Use Email Security Checker
- 1 Enter the domain you send mail from.
- 2 Click Check — DNS records for all six standards are queried.
- 3 Review the grade and each record's status, plus raw record text.
Key Features & Capabilities
- SPF detection with -all / ~all policy strength.
- DKIM found by probing common selectors (google, selector1, k1…).
- DMARC policy parsing (none / quarantine / reject).
- BIMI, MTA-STS and TLS-RPT checks.
- Weighted 0–100 score and letter grade.