Securing Email with Cisco Email Security Appliance (SESA) — Question 115

An engineer must limit responses from the gateway that are directed to invalid email addresses. How should the LDAP server be configured to accomplish this goal?

Answer options

• A. Validate the sender email address via an LDAP query during the SMTP conversation.
• B. Validate the sender email address via SMTP Call-Ahead to query an external SMTP server.
• C. Limit the number of invalid recipients per sender to stop responses after crossing the threshold.
• D. Limit the number of invalid responses per recipient to stop responses after crossing the threshold.

Correct answer: C

Explanation

The correct answer is C because it focuses on limiting the number of invalid responses sent to a sender, effectively managing the flow of email replies. Options A and B address validation methods but do not prevent responses to invalid addresses. Option D incorrectly suggests limiting invalid responses per recipient instead of per sender, which is not the requirement.