Which protocol is primarily used to download email messages from a mail server to a local client device?

Correct answer: POP3. POP3 (Post Office Protocol version 3) is designed specifically to retrieve and download emails from a mail server to a local client device.

Background: IMAP accesses and synchronizes mail directly on the server, while SMTP is used for sending outgoing emails.

• HTTP: Used for transferring web pages over the World Wide Web.
• IP: Handles packet addressing and routing across network boundaries.
• TCP: Delivers reliable, ordered stream transport between applications.

Did you know? POP3 downloads emails and usually deletes them from the server unless configured otherwise.

Memory trick: POP3 = Post Office Download.