Which of the following commands checks for valid users on an SMTP server?
Which of the following commands checks for valid users on an SMTP server?
The correct command to check for valid users on an SMTP server is VRFY. The VRFY command is used to verify the existence of a specific email address or mailbox on the server. When this command is issued, the server will confirm if the email address is valid and exists on the server.
C. VRFY Explanation: SMTP (Simple Mail Transfer Protocol) is a protocol used to transfer electronic mail messages between servers. The VRFY command is used to verify the existence of an email address or to check whether a specific mailbox exists on the server. When a user submits a VRFY command with an email address, the server will check whether the email address is valid and whether the mailbox exists on the server. If the email address is valid, the server will respond with the name of the mailbox associated with the email address.
C. VRFY
C. VRFY
C. VRFY See CEH v12 book - Module 04 Page 407
C. VRFY