Which TCP port is commonly used for email submission by an authenticated email client?
Options
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A.
25
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B.
110
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C.
587
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D.
More than one of the above
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E.
None of the above
Correct Answer (Detailed Explanation is Below)
C.
587
Detailed Explanation
Correct Answer: Port 587
- Port 587 is commonly used for message submission by email clients.
- It generally supports authentication and STARTTLS encryption.
- Port 25 is primarily used for SMTP server-to-server transfer.
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