Certified Ethical Hacker (CEH v13) — Question 27

Which of the following commands checks for valid users on an SMTP server?

Answer options

• A. RCPT
• B. CHK
• C. VRFY
• D. EXPN

Correct answer: C

Explanation

The VRFY command is specifically designed to verify if a user exists on the SMTP server. The RCPT command is used to specify the recipient of the email, while CHK is not a standard SMTP command, and EXPN is used to expand mailing lists rather than verify individual users.