Migrating Email to Multiple Accounts Using Thunderbird

Migrating Email to Multiple Accounts Using Thunderbird


  1. Enabling IMAP in email.

IMAP will need to be enabled on any email account you wish to migrate emails between.

  1. To enable IMAP in Gmail (also @blakeschool.org), click the gear icon in the upper right corner of your Gmail, and select settings from the drop down menu.

  1. Once in the Settings menu, go to the “Forwarding and POP/IMAP” tab (see arrow A below).

  2. Select “Enable IMAP” (see arrow B below).

  3. Select the “Auto-Expunge On” setting (see arrow C below).

  4. Select the no limit setting (see arrow D below).

  5. Save your changes (see arrow E below).

  1. Setup old email (XXX@blakeschool.org) in Thunderbird.

  1. Skip integration (unless you wish to use Thunderbird as your default mail application).

  1. Click “Skip this and use my existing email.”

  1. Type in a name, YOUR Blake email address (XXX@blakeschool.org), and YOUR Blake email password. Then click continue.

  1. Make sure IMAP (remote folders) is selected.

  1. Again enter YOUR Blake email address (XXX@blakeschool.org). Then enter YOUR Blake email password.

  1. Setup new or other email on Thunderbird.

  1. In Thunderbird, go to File > New > Existing Mail Account.

  2. You will be taken back to the screen from step 1.c. From here complete the steps as done previously.

This can be done with any email which supports IMAP.

  1. Install "ImportExportTools" Add-On for Thunderbird

  1. Go to https://addons.mozilla.org/en-us/thunderbird/addon/importexporttools/ and download the ImportExportTools extension , making sure to note where you save the download.

  2. In Thunderbird, go to Tools > Add-ons.

  1. Once in the Add-ons tab, click the gear icon drop down menu and select "Install Add-on From File...”

  1. Select the Add-on file you downloaded in part 2.a. (it will be called importexporttools- unless you changed the name before saving it).

  2. When warned to only install Add-ons from authors you trust, click “Install Now.”

  1. You will need to restart Thunderbird for the Add-on to work. Do this by quitting, or clicking the prompt in the upper right corner.

  1. Move your mail.

Once your mailboxes are properly set up, you will be able to drag individual messages, folders, or groups of folders from one mailbox to another using the Folder Pane menu in the Thunderbird application.

The changes made in Thunderbird will be reflected online in your mailboxes.


You can also drag email into the local folder, where it will be stored on your hard drive. You can find the location of this email by right clicking “Local Folders” and selecting settings.

Current local storage can be changed by Browsing to the desired location.


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