Thunderbird (Mac) - Exporting Personal Dictionary

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?.

Thunderbird creates a file named persdict.dat where custom dictionary entries are stored. This tutorial will describe how to access this file and its contents.

Exporting Thunderbird Personal Dictionary

Close Thunderbird before beginning the following steps.
  1. Open the Finder application.

    Open Finder

  2. Press Shift-Command-G to open the Go to Folder window. (If you are using a Windows keyboard use the "Windows" key in place of the "Command" key.)

  3. Type the following into the window: ~Library/Thunderbird/Profiles/

    Select Go to proceed.

    G to Folder

  4. A window will open with your Thunderbird profile folder. Open the folder.

    Open Profile Folder

  5. Navigate to the "persdict.dat" file. Copy and Paste it to your Desktop.

    Copy and Paste to Desktop

  6. Using a text editor (like TextEdit), open the "persdict.dat" file saved on your Desktop. You will see your list of custom dictionary words.

  7. In your new email client begin drafting a new message. Copy and Paste your word list from TextEdit. Run the spellchecker and add the words to your new email client's custom dictionary.

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