2003/12/06 pop, imap

There are two basic ways mail clients get email: POP and IMAP.

The difference between the two is that POP brings messages to your machine, while IMAP ALWAYS leaves messages on the server. IMAP only downloads header information initially. That can be advantageous for slow connections and for being able to access your email from multiple locations/machines. Pop also has the disadvantage of only using one folder (INBOX) while Imap can have multiple server folders.

Webmail uses IMAP. Outlook and most other mail clients can use POP or IMAP.

If you are accessing Email from two or more computers, you may find IMAP makes it easier to maintain a consistent view of your mail. However, you can achieve the same thing if you tell POP to leave a copy on the server and delete it when you delete your local copy.

The disadvantage of IMAP is that if you cannot connect to the server, you can't see mail that you've already seen (unless you have specifically copied it to a local folder). With POP, what has reached your inbox is now on your machine: you may not be able to get at new messages, but your old messages are here.

Some IMAP clients allow local storage automatically..

If your local machine doesn't get backed up, having the messages stored on the server can be a life saver. Of course if the server isn't being backed up, using IMAP can leave you with nothing at all after a server crash. It's never a bad idea to copy important email to local folders.

You can easily test mail connections:

How do I test a popd connection?
How do I test an imap server?
How do I test a smtp connection?

Take Control of Maintaining Your Mac

Take Control of Syncing Data in Leopard

Take Control of Upgrading to Snow Leopard

Take Control of Buying a Mac

Jump to Comments

Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them. I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. I also may own stock in companies mentioned here. If you have any question, please do feel free to contact me.

Specific links that take you to pages that allow you to purchase the item I reviewed are very likely to pay me a commission. Many of the books I review were given to me by the publishers specifically for the purpose of writing a review. These gifts and referral fees do not affect my opinions; I often give bad reviews anyway.

We use Google third-party advertising companies to serve ads when you visit our website. These companies may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by these companies, click here.