With this tool you can inspect and validate an MTA-STS policy and DNS record. We'll test the policy and record against all requirements from the DKIM standard RFC8461
Just enter your domain name below and press the inspect button.
We will test the DNS record at
_mta-sts.[your-domain] and the policy file at
Mailhardener offers hosted MTA-STS, which will allow you to adopt MTA-STS for your domain in less than a minute. It's completely maintenance free. Mailhardener hosted MTA-STS comes included for free in every paid tier.