Email Protocols There are three common protocols used to deliver email over the Internet: the Simple Mail Transfer Protocol (SMTP), the Post Office Protocol (POP), and the Internet Message Access Protocol (IMAP).

What are the protocols of email?

Email Protocols There are three common protocols used to deliver email over the Internet: the Simple Mail Transfer Protocol (SMTP), the Post Office Protocol (POP), and the Internet Message Access Protocol (IMAP).

What is SMTP and IMAP?

SMTP is the industry standard protocol for sending email. … IMAP is one of the most common protocols for receiving email. IMAP syncs messages across all devices. POP3 is another protocol for receiving email on a single device. Using POP3 means that your email will be accessible offline and deleted from the server.