If you’re using IMAP4, you can choose the folders that you want Thunderbird to synchronize with the server. If you’re using an incoming POP3 server, you can only synchronize your Inbox folder. Then try to connect using your POP3 or IMAP4 program. After you sign in to your account, sign out. Connecting to your email account through POP3 or IMAP4 will fail if you haven't registered your account through Outlook Web App. If your email account is the type that requires registration, you must register it the first time you sign in to Outlook Web App. If you don't know whether to use POP3 or IMAP4, consider using IMAP4 because it supports more features. The POP3, IMAP4, and SMTP server name and other settings you may need to enter are listed on the Settings for POP and IMAP Access page under POP setting or IMAP setting, and SMTP setting. In Outlook Web App, on the toolbar, click Settings > Options > Account > My account > Settings for POP or IMAP access. Sign in to your account using Outlook Web App. If you’re not connecting to Microsoft 365 email, do the following to look up your settings. For Microsoft 365, the server name for IMAP and POP is and the server name for SMTP is. If you’re connecting to your Microsoft 365 email, you don’t need to look up your settings. You’ll also be able to access your messages from a different mail application. After you select this check box, a copy of the messages you retrieve to your local computer will be kept on the server. Note: If you're using POP, under Server Settings, it's a good idea to select Leave messages on the server. If you’re not using Microsoft 365, see Find your POP3 and IMAP server settings later in this article. If you’re connecting to your Microsoft 365 email, the IMAP or POP server name is. In the Server hostname box, enter the name of your incoming server. The IMAP check box, next to Incoming, is selected by default and is recommended. You’ll see the message: 'Thunderbird failed to find the settings for your email account.' Thunderbird will try to find the settings you need to configure for your account.Ĭlick Stop, or wait for Thunderbird to try to find your account settings. Click Continue if you're using a Windows computer or click Next if you're using a Mac. In the Password box, enter your password. In the Email Address box, enter your email address.

In the Your Name box, enter the name that you want to appear on the 'From' line in your outgoing messages. In the Mail Account Setup dialog box, do the following: On the Account Settings page, under Account Actions, click Add Mail Account. On the Tools menu, click Account Settings. If the Mail Account Setup dialog box doesn't open, do the following: The Mail Account Setup dialog box will open the first time that you open Thunderbird. Set up email using Mozilla Thunderbird 8.0 Note: This topic applies to Office 365 operated by 21Vianet in China.

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