Office 365 IMAP Thunderbird

To configure an Office 365 IMAP Thunderbird on the Mozilla email client, refer to the step-by-step guidelines mentioned below.

  • Step 1: On the desktop of your Windows computer, double-click the Mozilla Thunderbird application.
  • Step 2: This will launch the main interface of the Mozilla Thunderbird application on the Windows computer.
  • Step 3: If you see the ‘Welcome to Thunderbird’ dialog box on the screen, select the ‘Skip this and use my existing email’ option.
  • Step 4: When the Mail Account Setup dialog window opens, fill the correct information in the Your Name, Email Address, and Password fields.
  • Step 5: If necessary, mark the checkbox next to the Remember Password option.
  • Step 6: Click the Continue button in the Mail Account Setup dialog window.
  • Step 7: Now, the Mozilla Thunderbird tries to configure your email account automatically.
  • Step 8: If the ‘Thunderbird failed to find the settings for your email account’ message appears on the screen, use the server settings mentioned here to configure the Office 365 email account manually on the Thunderbird application.
  • Step 9: Select the IMAP protocol from the Incoming drop-down list.

Incoming Mail Server:

  • Step 1: Type ‘’ in the Server Hostname column for the Incoming field.
  • Step 2: Choose the 993 option from the Port drop-down menu.
  • Step 3: Choose the SSL/TLS protocol from the SSL drop-down list.
  • Step 4: Ensure that the Normal Password option has been chosen from the Authentication drop-down menu.

Outgoing Mail Server:

  • Step 1: After selecting the 465 option from the Port drop-down list, choose the SSL/TLS protocol from the SSL menu.
  • Step 2: Make sure to choose the Normal Password option from the Authentication drop-down menu.
  • Step 3: Click the Done button in the Mail Account Setup dialog window.
  • Step 4: If the ‘Mail Server Password Required’ prompt dialog box, type the password and click the OK button.
  • Step 5: Now, you can send emails on the Mozilla Thunderbird application.
  • You can contact our technical experts if you have no idea about how to configure Office 365 IMAP Thunderbird on the Mozilla email client.

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