Thunderbird – How to change the number of days your email is kept on the server

Changing the Mozilla Thunderbird settings

To leave messages on the server, you will:

  • Open the server settings window for your mail account
  • Check the Leave messages on server checkbox

1. Start the Mozilla Thunderbird program.

When Thunderbird opens, click Tools, then Account Settings from the menu bar.

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2. The Account Settings window will appear.

  • Click the small “plus sign” to the left of the account to expand the list beneath it.
  • Click Server Settings.
  • Check the box next to Leave messages on server. You may also want to check the Until I delete or move them from Inbox option as well.
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3. Close the Account Settings window.

  • Click OK to close the Account Settings window.