Comparing POP and IMAP


Best when you will be primarily accessing your mail from a single location, like your office or home. When you leave your office or home, you can still access your mail from a web browser.

Messages are downloaded to your computer, so you don’t need to worry about exceeding the size of your mailbox.

When accessing your mail account through a web browser, you may not see previous messages that were downloaded to Mozilla Thunderbird.


Best when you will be accessing your mail from multiple locations.

Allows you to create portable folders. These folders will appear in each mail client you use to access your account. Your account will look the same at work, at home, and at your friend’s house.

Because your mail messages are stored on the server, you must monitor your mailbox size and delete messages to avoid exceeding your mailbox size.


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