POP vs IMAP Print E-mail
The article contains information regarding the differences between the POP and IMAP internet protocols that are used when configuring an email client, such as Microsoft Outlook.

POP and IMAP are two Internet protocols for accessing e-mail.

POP is the older, more traditional method. POP is a connect and fetch system. You connect, autheticate, and your messages are transferred to your local computer. IMAP, on the other hand, is a remote mail management system. You connect and authenticate, but messages are never transferred to your local computer unless you explicitly save a message to a local file. It allows for access to multiple folders on the server, so you can access all of your mail from any computer system, as opposed to POP, where only the messages in your incoming mailbox on the server and messages stored locally on your PC are available. The tradeoff is that you have to be connected to access any of your e-mail using IMAP, whereas with POP, you have access to the locally stored mailboxes. IMAP is preferable when you wish to manage all of your messages from mutiple computer systems, and is more efficient on low speed links (since messages aren't transferred until you request to read them). POP is better if you prefer to keep your mail on your own personal system rather than leaving messages on the server. Using IMAP has other advantages, including nightly backups of messages, and old messages aren't locked into any particular e-mail client - allowing easy migration between e-mail tools. Currently IMAP is only available on UNIX based mail servers (COES, CoE, BETA). It is expected that the University will move toward IMAP based solutions.

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