IMAP is a little more complex than POP, but the biggest aspect to remember is that all changes with IMAP happen on the server. Once you make changes to your email, such as deleting messages or sending a new email, the server processes and saves these changes, then disconnects.
This is cached locally, so you can work on your device. After it connects to the email server, it fetches whatever content you requested, like all new email or the contents of a specific message. IMAP works a little differently than POP. This can be useful if you're worried about losing your mail, but if your mail provider doesn't offer much server space, it can cause you to run out quickly. Note that while POP will delete mail from the server by default, a lot of POP setups allow you to leave copies of your email on the server. This means that the messages then only exist on the device you downloaded them to. Finally, it deletes the mail in question from the email server before disconnecting. It then stores this mail locally on your device so you can access it in your email client. Once it's successfully connected, it grabs all the mail on the server. When using POP, the email client first connects to the email server.
To properly compare POP and IMAP, let's look at a simplified version of how they each work. The Workflow Differences Between POP and IMAP While POP4 has been proposed, it's been dormant for a long time. POP3 is still the current version of the protocol, though this is often shortened to just POP. Two revisions that added some enhancements, called POP2 and POP3, followed in later years.
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It was created in 1984 as a way to download emails from a remote server. POP stands for Post Office Protocol, and is the older of the two. You don't need to worry about these email protocols when you use webmail (such as ), because the service handles it all for you. They're used when connecting to your email account from a desktop email app, like Thunderbird, Outlook, Apple Mail, Spark, or similar. POP and IMAP are both protocols used for retrieving email from an email server so you can read messages on your device.
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Do you know which one to choose, and why? If you aren't sure what these terms stand for and how each affects your email account, don't worry.īelow, we explain how these protocols work, the differences between POP and IMAP, and how to decide which one best fits your needs. When you set up an email client or app, you'll come across the terms POP and IMAP.
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