---
title: "Free MTA-STS Checker: Validate Policy and TLS-RPT | WarmInboxes"
description: "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."
url: https://warminboxes.com/videos/mta-sts-checker
breadcrumb: "Home > Tool demos > MTA-STS Checker"
---
# 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 →](https://warminboxes.com/mta-sts-checker) Free, no account.