Office 365 (Thunderbird) - Modify Message Settings

Best Effort Support Only

This document contains instructions on using a non-Microsoft email client, such as Apple Mail or Thunderbird. Microsoft does not recommend these clients for use with Office 365, and there are often significant limitations in client functionality as a result.

Because of this, the DoIT Help Desk is only able to offer best effort support for these clients, and certain issues may require the use of a Microsoft client in order to be resolved. For more information on Office 365 client support, please see: Office 365 - Which clients/protocols will be supported?.

In Thunderbird there are several settings you can change in messages. Follow the steps below.

  1. Open Thunderbird
  2. Click the Menu button next to the search bar (three horizontal lines)

    menu button

  3. From the drop down menu, select Options (On a Mac, select Preferences).
  4. In the pop up menu, click on the Composition tab

    Composition Tab

  5. From this tab there are three options
  6. In General you can:
  • In Addressing you can:
  • In Spelling you can