https://www.greengeeks.com/tutorials/how-to-use-pop3-smtp-and-imap-protocols/
How to Use POP3, SMTP and IMAP Protocols - GreenGeeks
Oct 20, 2021 - POP3, SMTP and IMAP are all popular email protocols. Learn how and when to use each one and when a certain protocol may benefit you more.
how to usesmtp and imappop3protocols