Free Tools
Security· Free Tool
MTA-STS Checker
Verify your Mail Transfer Agent Strict Transport Security policy
MTA-STS (Mail Transfer Agent Strict Transport Security) is a security standard that allows domains to declare their capability to receive TLS-secured SMTP connections. It helps prevent man-in-the-middle attacks on email transport.
Enter Domain
Checks both the DNS TXT record and the policy file hosted on your domain.
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