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Free MTA-STS Checker: Validate Policy and TLS-RPT

Tool demo · MTA-STS Checker

A short walkthrough of the free WarmInboxes MTA-STS checker: validate a domain's MTA-STS record, its policy file and its TLS-RPT reporting address.

MTA-STS Checker

Validate your _mta-sts record and policy file: enforce mode, MX patterns and TLS-RPT.

Run the MTA-STS Checker → Free, no account.

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