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S. Leo, Content Blogger, Journalism and Content Marketing, Mexico
Answered Apr 21, 2020
When emails are coming to you from different sources, the two commonly used protocols are POP or Post Office Protocol and IMAP or Internet Message Access Protocol. One of the major differences between the two is that IMAP is the newer of the two. Though both are more reliable, since IMAP is more recent, and it is often used by people when retrieving their emails.
Although both serve the same function, however, both differ greatly when it comes to how they implement their functions. For instance, when you use IMAP, it reads and downloads all the messages in the server without deleting anything on the server. In contrast, when you use POP, it gets you all the messages in the server without leaving anything on the server.
Another difference is that, once you are connected to the mail server using IMAP, it keeps you connected unless you decide to log out, whereas POP will get you disconnected as soon as the emails are read.
POP stands for Post Office Protocol, while IMAP stands for Internet Mail Access Protocol. POP is used to download emails from a central mail server. It constitutes a general email. POP clients or functions like MS Outlook and MS Outlook Express will download all emails from the server to the local computer, delete them on the server and then disconnect the connection, which was established by TCP and UDP.
IMAP is another protocol. Emails will be kept in the centralized server and could be reachable from clients anywhere. It is a remote desktop connection to a server where the email clients like Outlook is operating on the same machine where the POP service is also running. POP downloads and disconnects from the server, while IMAP clients are always connected and send notifications when new mail comes in.