You can connect Mozilla Thunderbird 8.0 to your email account using POP3 or IMAP4 connectivity. These instructions apply to Windows and Mac.

Note: This topic applies to Office 365 operated by 21Vianet in China.

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Set up email using Mozilla Thunderbird 8.0

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

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1. Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features! Download Thunderbird — English (US) Windows 64-bit.
2. Thunderbird now provides an offline way to read your downloaded email. You can browse through it, read messages, search, grab file attachments-anything you could do with Gmail online. This is an excellent backup solution that provides peace of mind.
3. Mozilla Thunderbird is an open-source desktop-based email client that allows you to send and receive emails from one or more email accounts easily. Since it is free of cost and comes in an easy interface, it has a large number of users. However, there are cases when users need to upgrade the computer or switch the computer.

1. Open Mozilla Thunderbird. The Mail Account Setup dialog box will open the first time that you open Thunderbird. If the Mail Account Setup dialog box doesn't open, do the following:

   1. On the Tools menu, click Account Settings.

   2. On the Account Settings page, under Account Actions, click Add Mail Account.

2. In the Mail Account Setup dialog box, do the following:

   1. In the Your Name box, enter the name that you want to appear on the 'From' line in your outgoing messages.

   2. In the Email Address box, enter your email address.

   3. In the Password box, enter your password. Click Continue if you're using a Windows computer or click Next if you're using a Mac. Thunderbird will try to find the settings you need to configure for your account.

3. Click Stop, or wait for Thunderbird to try to find your account settings. You’ll see the message: 'Thunderbird failed to find the settings for your email account.'

4. The IMAP check box, next to Incoming, is selected by default and is recommended. In the Server hostname box, enter the name of your incoming server. If you’re connecting to your Microsoft 365 email, the IMAP or POP server name is partner.outlook.cn. If you’re not using Microsoft 365, see Find your POP3 and IMAP server settings later in this article.

   Note: Leave the Port option set to Auto. Leave the SSL and Authentication options set to Autodetect.

5. In the Server hostname text box, next to Outgoing, enter your SMTP server name. If you’re connecting to your Microsoft 365 email, the SMTP server name is smtp.office365.cn. If you’re not using Microsoft 365, see Find your POP3 and IMAP server settings later in this article.

   Note: Leave the Port option set to Auto. Leave the SSL and Authentication options set to Autodetect.

6. In the Username box, type your complete email address. For example, tonysmith@contoso.cn.

7. Click the Re-test button. If you see the message 'The following settings were found by probing the given server,” click Create Account. A page opens that lets you view or change other Thunderbird settings.

   Click OK when you've finished viewing or changing the settings. If you’re unable to connect, see “What else do I need know?” later in this topic.

   Note: If you're using POP, under Server Settings, it's a good idea to select Leave messages on the server. After you select this check box, a copy of the messages you retrieve to your local computer will be kept on the server. You’ll also be able to access your messages from a different mail application.

Find your POP or IMAP server settings

Mozilla Thunderbird For Windows 10 64 Bit

If you’re connecting to your Microsoft 365 email, you don’t need to look up your settings. For Microsoft 365, the server name for IMAP and POP is partner.outlook.cn and the server name for SMTP is smtp.office365.cn.

If you’re not connecting to Microsoft 365 email, do the following to look up your settings.

1. Sign in to your account using Outlook Web App.

2. In Outlook Web App, on the toolbar, click Settings > Options > Account > My account > Settings for POP or IMAP access.

3. 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.

What else do I need to know?

• If you don't know whether to use POP3 or IMAP4, consider using IMAP4 because it supports more features.

• If your email account is the type that requires registration, you must register it the first time you sign in to Outlook Web App. Connecting to your email account through POP3 or IMAP4 will fail if you haven't registered your account through Outlook Web App. After you sign in to your account, sign out. Then try to connect using your POP3 or IMAP4 program.

• If you’re using an incoming POP3 server, you can only synchronize your Inbox folder. If you’re using IMAP4, you can choose the folders that you want Thunderbird to synchronize with the server. Remember that IMAP4 doesn’t support the synchronization of the Contacts and Calendar folders. Thunderbird uses a folder named Sent to store sent items. Exchange and Outlook Web App use a folder named Sent Items. You can synchronize the email items that you’ve sent in Thunderbird with the Sent Items folder on the Exchange server. To do this, follow these steps:

• In Thunderbird, in the console tree, select your email account. In the details pane, under Advanced, click Manage Folder Subscriptions. In the Subscribe dialog box, select the Sent Items check box, and then click OK.

• In Thunderbird, on the Tools menu, click Account Settings.

• In the navigation pane of Account Settings, select Copies & Folders for your email account.

• In the details pane, under When sending messages, automatically, select Other. In the drop-down list, select your user name, select Sent Items, and then click OK.

  

Thunderbird is Mozilla's free email application that can be downloaded on Windows and Mac. If you need help with the download and installation process, you can find instructions on the Mozilla Thunderbird support page.

This tutorial is meant for Thunderbird 60.5.3. Thunderbird 60.0+ only works on Windows 7, 8, and 10.

You can find information about finding your email's username and other configuration settings in the How to Set Up an Email Reader article.

Setting up your email on Thunderbird on Windows 10 (Thunderbird 60.5.3)

Once you have downloaded and installed Thunderbird on to your machine, you can follow these steps to set up your Pair email:

1. Open the Thunderbird application
2. On the main page, under the Create a new account heading, click Email
   

   This page will come up automatically for new users and some existing users. If this page does not come up y default, you can click Local Folders in the left sidebar to navigate to the page.

3. A window will appear. Enter your email information here:
   

   Your Name	This name will appear as the sender of your email
   Email Address	The Pair email address you are planning to use with Thunderbird
   Password	Your email address' password. Note: This is not your ACC account password

4. Click Continue
5. Select IMAP or POP. For more information see our IMAP or POP: Which One Should You Use? article
6. Click Manual Config
7. Enter the incoming and outgoing mail servers and the username:
   
   

   For instructions on how to find your mail servers, read our How to Find Your Email's Incoming and Outgoing Servers.

   Incoming	Incoming mail server Example: username.mail.pairserver.com, mailX.pair.com
   Outgoing	Outgoing mail server Example: username.mail.pairserver.com, mailX.pair.com
   Username	The email address you are currently setting up

8. Click Re-test
9. If no errors appear, click Done

Your Pair email address should now be displayed in the Thunderbird sidebar. You can click the name of your address to view its inbox.

Using SSL to Secure Your Email

Pair Networks provides support for SSL/TLS and STARTTLS encryption for all IMAP, POP, and authenticated SMTP connections. Using encryption is an important way to prevent your password from being stolen.

POPS/IMAPS only secures the connection between your email reader and the mail server. Once it reaches the mail server, it will be in plain text. For additional security, you would need to encrypt the email message itself. The port for POPS is 995, the port for the IMAPS is 993, and the ports for encrypted authenticated SMTPAUTH are 465 and 587. These are the standard ports for these services, and you should not need to manually set them.

Please note that we replaced the secure certificate used to provide POPS, IMAPS, and SMTPS email services (sending and receiving email over SSL). Our SSL certificate vendor has changed to a new 'root' certificate, which is recognized by most, but not all, email programs. If your email program begins returning errors and indicates that the server certificate is not recognized, please download the root certificate below and install it in your email program. The specifics of how to install a certificate will vary from program to program -- please consult the help files of your program for details.

Please also note that our mail servers use an SSL certificate. If you use this SSL option in conjunction with a domain name, your email reader may warn you that the domain names do not match. Some email readers will allow you to ignore this warning. In these cases, your incoming email will remain secure.

However, some email readers will not let you proceed if the security certificates do not match. If this occurs, please verify your incoming server settings as follows:

For accounts created prior to June 1, 2011:

mailX.pair.com

( X is your server number)

For accounts created on or after June 1, 2011:

username.mail.pairserver.com

( 'username' is your main account username)

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