SMTP stands for "Simple Mail Transfer Protocol" and is
a protocol for sending emails.
IMAP stands for "Internet Access Message Protocol" and
is a protocol for receiving emails. IMAP stores the message on a server and
synchronizes the message across multiple devices, so it can be accessed whenever you
have an internet connection.
POP3 stands for "Post Office Protocol Version 3" and is another
protocol for receiving emails. This protocol enables offline mode. Emails are
transmitted from a server to the email program you use and then deleted from the
server (unless you manually change the