Importing Email from Thunderbird


Is an import process required?

A key question is whether you need to manually import anything at all. Please note the following:

  • If your account is using IMAP, then you do not need to import your messages since Postbox will download your folders and messages from your email server.
  • If your account is using POP or POP3, then Postbox can download messages from your Inbox. Messages in other folders will need to be manually imported.
  • Any messages stored on your local machine will need to be manually imported.

Manually migrate POP email from Thunderbird to Postbox

  1. Quit Postbox if it is currently running.
  2. Within Thunderbird, compact your folders by selecting Compact Folders from the File menu. If your mailboxes are quite large, this could take several minutes. When compaction is complete, Quit Thunderbird.
  3. As a precaution, backup Thunderbird by making a copy of your profile directory. Information on how to do this can be found in this article.
  4. Also, make a backup of your Postbox profile as well.
  5. Find the SOURCE mail folders you would like to copy from Thunderbird:

    On the Mac, they are located at:
    [your home folder]/Library/Thunderbird/Profiles/[your profile]/Mail

    On Windows, they are located at:
    C:\Documents and Settings\[Windows user name]\Application Data\Thunderbird\Profiles\[your profile]/Mail

    POP Mail is contained in the Mail folder.

  6. In a separate window, navigate to your TARGET Postbox folder:

    On the Mac Local Folders is located at:
    [your home folder]/Library/Application Support/PostboxApp/Profiles/[your profile]/Mail/Local Folders

    On Windows Local Folders is located at:
    C:\Documents and Settings\[Windows user name]\Application Data\PostboxApp\Profiles\[your profile]\Mail\Local Folders

  7. Copy the contents of your Thunderbird SOURCE folder to the Postbox TARGET folder.
  8. Start Postbox and you should be set to go!

For more migration options, please see this article.

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