Email Ports and Protocols

Question 1

Simple Mail Transfer Protocol (SMTP)

Answer 1

Standard protocol used for sending emails accross the interent and operates over Port 25. (SMTPS uses ports 465 or 587)

Question 2

Post Office Protocol version 3 (POP3)

Answer 2

Used to retrieve emails from a remote server to a local client over Port 110.

Question 3

Internet Message Access Protocol (IMAP)

Answer 3

Operates over Port 143 and allows users to manage emails directly on the email server, (IMAPS uses ports 993)