Securing Email with Cisco Email Security Appliance (SESA) — Question 127

An organization has strict rules for meeting specific criteria to approve certificate authorities. A Cisco ESA administrator within the organization is receiving complaints about failed inbound emails from a domain. The administrator is also seeing TLS certificate errors. What is the reason for this issue?

Answer options

• A. Firewall inspection is preventing transmission of certificate data.
• B. The certificate authority is not on the system list.
• C. The TLSv1.0 protocol is not supported.
• D. The certificate chain is broken.

Correct answer: D

Explanation

The correct answer is D, as a broken certificate chain indicates that one or more certificates in the chain are missing or invalid, which can lead to TLS errors. Options A and C are not relevant to the TLS certificate errors specifically, and B would suggest a problem with certificate authority approval rather than a chain issue.