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300-720 · Question #113
300-720 Question #113: Real Exam Question with Answer & Explanation
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Cisco ESA LDAP, Mail Policies, and Authentication
Question
Spammers routinely try to send emails with the recipient field filled with a list of all possible combinations of letters and numbers. These combinations, appended with a company's domain name are malicious attempts at learning all possible valid email addresses. Which action must be taken on a Cisco ESA to prevent this from occurring?
Options
- AQuarantine external authentication queries.
- BEnable end user safelist features.
- CPerform LDAP acceptance validation.
- DSelect the SMTP Authentication Query checkbox.
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Topics
#Recipient Validation#Address Harvesting Protection#LDAP Acceptance#Anti-Spam Techniques