Access Outlook Mail (Outlook.com) in Mozilla Thunderbird

Send and receive your Outlook email in the Thunderbird web browser

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Set up the Mozilla Thunderbird email client to connect to your Outlook.com account using IMAP and get access to messages, your online folders, and other Outlook.com features. Or connect to your Outlook.com account using the POP email protocol to download messages from your inbox to Thunderbird.

Instructions in this article apply to the Mozilla Thunderbird web browser; and to Microsoft, work, and school accounts that have access to Outlook Online.

Set Up Outlook.com in Thunderbird Using IMAP

Follow these steps to set up your Outlook.com email account in Thunderbird using IMAP.

  1. Open the Thunderbird Menu.

    Thunderbird Menu button
  2. Select Options > Account Settings.

    Thunderbird Menu with Options and Account Settings selected
  3. Select the Account Actions dropdown arrow and choose Add Mail Account.

    Thunderbird Account Actions dropdown menu with Add Mail Account selected
  4. Enter Your name, the Email address for your Outlook.com account, and the Password.

    If two-step verification is enabled for your Outlook.com account, generate a Microsoft account app password and enter the app password in the Password text box.

    Thunderbird account setup window with name and email address fields filled
  5. Select Continue.

  6. In the Configuration found in Mozilla ISP database section, select IMAP (remote folders).

    Thunderbird email setup IMAP configuration
  7. Select Done.

  8. In the Account Settings dialog box, select OK.

If Mozilla Thunderbird did not automatically detect the Outlook.com mail server settings, enter these settings through manual set up:

  • IMAP server name: outlook.office365.com
  • IMAP port: 993
  • IMAP encryption method: TLS
  • SMTP server name: smtp.office365.com
  • SMTP port: 587
  • SMTP encryption method: STARTTLS

Enable POP Access on Your Outlook.com Account

To use POP as the connection protocol to your Outlook.com account, enable it by following these steps:

  1. Go to your Outlook.com account and select Settings > View all Outlook settings.

    Outlook.com Settings and
  2. Select Mail > Sync email.

    Outlook.com Mail > Sync email options selected
  3. In the POP and IMAP section, select Yes to let devices and apps use POP.

    Outlook.com
  4. Choose whether you want devices and apps to delete messages after they are downloaded from Outlook.com.

    • Select Don't allow devices and apps to delete messages from Outlook to keep messages on Outlook.com after Thunderbird downloads them.
    • Select Let apps and devices delete messages to delete messages from Outlook.com after Thunderbird downloads them.
    Thunderbird option to delete messages from Outlook.com after they're downloaded
  5. Select Save.

Set Up Outlook.com in Thunderbird Using IMAP

After enabling POP access on your Outlook.com account, follow these steps to connect Thunderbird using POP:

  1. Open the Thunderbird Menu and select Options > Account Settings.

    Thunderbird Menu with Options and Account Settings selected
  2. Select the Account Actions dropdown arrow and choose Add Mail Account.

    Thunderbird Account Actions dropdown menu with Add Mail Account selected
  3. Enter Your name, the Email address for your Outlook.com account. and the Password.

    If two-step verification is enabled for your Outlook.com account, generate a Microsoft account app password and enter the app password in the Password text box.

    Thunderbird account setup window with name and email address fields filled
  4. Select Continue.

  5. In the Configuration found in Mozilla ISP database section, select POP3 (keep mail on your computer).

    Thunderbird Outlook.com email account setup with POP3 option selected
  6. Select Done.

  7. In the Account Settings dialog box, select OK.

If Mozilla Firefox did not automatically detect the Outlook.com mail server settings, enter the following settings through manual set up:

  • POP server: outlook.office365.com
  • POP port: 995
  • POP encryption method: TLS
  • SMTP server: smtp.office365.com
  • SMTP port: 587
  • SMTP encryption method: STARTTLS