TLS failure details

Failure

Failure Type

Type of failure encountered.

One of: Remote server does not support STARTTLS (startTlsNotSupported), Certificate hostname does not match server (certificateHostMismatch), Certificate has expired (certificateExpired), Certificate is not trusted (certificateNotTrusted), General certificate validation failure (validationFailure), DANE TLSA record is invalid (tlsaInvalid), DNSSEC validation failed (dnssecInvalid), DANE is required but not available (daneRequired), Failed to fetch MTA-STS policy (stsPolicyFetchError), MTA-STS policy is invalid (stsPolicyInvalid), MTA-STS WebPKI validation failed (stsWebpkiInvalid), Other or unrecognized failure type (other). Name in the API: resultType.

Failed Sessions

Number of sessions that failed with this error.

A number. Default: 0. Name in the API: failedSessionCount.

Reason Code

Error code or reason string for the failure.

Text. Name in the API: failureReasonCode.

Additional Info

Additional context about the failure.

Text. Name in the API: additionalInformation.

Endpoints

Sending MTA IP

IP address of the sending mail server.

An IP address. Name in the API: sendingMtaIp.

Receiving MX Hostname

Hostname of the receiving mail server.

Text. Name in the API: receivingMxHostname.

Receiving MX HELO

HELO/EHLO string of the receiving mail server.

Text. Name in the API: receivingMxHelo.

Receiving IP

IP address of the receiving mail server.

An IP address. Name in the API: receivingIp.