![]() Therefore, by default, IMSVA will NOT authenticate sending/receiving MTAs by verifying their certificates. Because many MTAs on the Internet are not configured with certificates signed by valid CA, authenticating MTAs by verifying their certificates will result in many false-alarms. ![]() These CA certificates are used to authenticate the sending MTAs’ identity (for Messages Entering IMSVA) and the receiving MTAs’ identity (for Messages Exiting IMSVA). IMSVA installation package comes with many pre-imported CA certificates, many of them are now expired. Note that the certificates with “No” in Valid column are the ones that triggered the alert. The related CA certificates are listed under Administration > IMSVA Configuration > Transport Layer Security > Trusted CA Certificates. The alert indicates that certain imported or pre-imported CA certificates are expired.
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