Home / Free tools / MTA-STS checker
Free tool
MTA-STS checker
MTA-STS (RFC 8461) tells sending servers to enforce TLS encryption when delivering mail to your domain. Microsoft and Google increasingly require it. We check the announcement TXT record.
Home / Free tools / MTA-STS checker
Free tool
MTA-STS (RFC 8461) tells sending servers to enforce TLS encryption when delivering mail to your domain. Microsoft and Google increasingly require it. We check the announcement TXT record.