Using POP3 and IMAP4 E-Mail Programs
Applies to: Office 365 for professionals and small businesses, Office 365 for enterprises, Microsoft Exchange, Live@edu
This topic provides information about how to connect to your e-mail account by using e-mail programs that use Post Office Protocol version 3 (POP3) or Internet Message Access Protocol version 4rev1 (IMAP4). POP3 and IMAP4 are Internet protocols that let you retrieve e-mail from an e-mail server to your computer. POP3 and IMAP4 e-mail programs provide basic e-mail functionality. Generally, though, connecting to your account using POP3 and IMAP4 doesn’t let you use the rich e-mail and collaboration features that are provided when you connect using an Exchange account. For the best collaboration experience, we recommend that you connect to your account by using Outlook Web App, or through an e-mail program that supports Exchange account access such as Outlook 2007, Outlook 2010, Apple Mail 10.6 Snow Leopard, Apple Mail 10.7 Lion, Entourage 2008 Web Services Edition, or Outlook for Mac 2011.
For information about the e-mail and collaboration features supported by the various programs you can use to connect to your e-mail account, see Supported E-Mail Programs and Features. To review instructions for setting up e-mail on your mobile phone, see Mobile Phone Setup Wizard. To review instructions for setting up e-mail on your desktop e-mail program, see E-Mail Setup Help Wizard.
Using POP3 E-Mail Programs
By default, when POP3 e-mail programs download e-mail messages to your computer, the downloaded messages are removed from the server. Because a copy of each of your e-mail messages isn't kept on the server, you can't access e-mail messages that you've downloaded on more than one computer.
But some POP3 e-mail programs can be set up to keep copies of your messages on the server so you can access the same e-mail messages from more than one computer. POP3 e-mail programs can only be used to download messages from the e-mail server to a single folder (usually the Inbox) on your computer. The POP3 protocol can't synchronize multiple folders on the e-mail server with multiple folders on your computer. POP3 also doesn't support public folder access.
Using IMAP4 E-Mail Programs
E-mail programs that use IMAP4 are more flexible and generally offer more features than e-mail programs that use POP3. By default, when IMAP4 e-mail programs download e-mail messages to your computer, a copy of downloaded messages remains on the server. Because a copy of your e-mail is kept on the server, you can access the same message from more than one computer. With IMAP4 e-mail, you can access and create multiple e-mail folders on the server. You can then access any message from any folder on the server from computers in multiple locations.
For example, most IMAP4 e-mail programs can be set up to keep a copy of your sent items on the server so that you can view your sent items from a different computer. IMAP4 supports additional features that aren't supported by most POP3 programs. For example, some IMAP4 programs include a feature that lets you view only the headers of your e-mail messages on the server—who the message is from and the subject—and then download only the messages you want to read. IMAP4 also supports public folder access.
Send and Receive Options for POP3 and IMAP4 E-Mail Programs
POP3 and IMAP4 e-mail programs let you choose when to connect to the server to send and receive e-mail. This section presents some common connectivity options and also provides some factors for you to consider when you select connection options in your POP3 and IMAP4 e-mail program.
Common Configuration Settings
Three of the most common connection settings that can be set on a POP3 or IMAP4 e-mail program are as follows:
- Send and receive messages every time that you start the e-mail program When this setting is used, mail is only sent and received when you start the e-mail program.
- Send and receive messages manually When this setting is used, messages are only sent and received when you click a "send and receive" option in the POP3 or IMAP4 e-mail program.
- Send and receive messages every set number of minutes When this setting is used, your e-mail program connects to the server every set number of minutes to send messages and download any new messages.
For information about how to set these settings for the e-mail program you use, see the Help documentation provided with that e-mail program.
Note
If you have a cloud-based email account (for example, if your organization is using Microsoft Office 365 for enterprises, Office 365 for professionals and small businesses, or Live@edu), and you connect to your account using POP3 or IMAP4, Exchange meeting requests from email users in your organization arrive in your Inbox as an email items with links to the Outlook Web App instances of the meeting requests. For more information, see "Why do meeting requests arrive in my Inbox as a mail items with links to the Outlook Web App instance of the meeting request? I would rather receive meeting requests as iCal attachments. Can this be changed?" in FAQs: E-Mail Programs.
Considerations When You Choose Send and Receive Settings
If your device or computer that's running a POP3 or IMAP4 e-mail program is always connected to the Internet, you may want to set the e-mail program to send and receive messages every set number of minutes. Connecting to the server frequently helps keep your e-mail program up-to-date with the most current information on the server. But if your device or computer running the POP3 or IMAP4 e-mail program isn't always connected to the Internet (for example, if you connect to the Internet by using a dial-up connection), you may want to configure the e-mail program to send and receive messages manually. Sending and receiving messages manually when you connect using dial-up can potentially reduce the time you're connected to the Internet.
POP3 and IMAP4 Programs
If your e-mail account supports POP3 and IMAP4, you can use many different POP3 and IMAP4 e-mail programs to connect to your account. These programs include Outlook, Windows Mail, Outlook Express, Entourage, and third-party programs such as Mozilla Thunderbird and Eudora. The features supported by each e-mail program vary. For information about the features offered by specific POP3 and IMAP4 e-mail programs, see the documentation included with each program.
Note
If you don't know if your e-mail account supports POP3 and IMAP4, contact the person who manages your mailbox (sometimes called an e-mail administrator).
E-Mail Programs That Use POP3 or IMAP4
The following table lists some POP3 and IMAP4-compliant e-mail programs.
| E-mail program | Supported operating systems |
|---|---|
Windows |
|
Windows |
|
Windows |
|
Windows |
|
Windows |
|
Macintosh |
|
Mail (also known as Apple Mail 3.0) |
Macintosh |
Windows/Macintosh |
|
Windows/Macintosh |
|
Windows/Macintosh |
|
Windows/Macintosh |
|
Macintosh |
|
Amazon Kindle Fire E-Mail |
Kindle Fire |
Windows Mobile 5 or later |
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