Google Email Uploader for Mac and Windows
Google email Uploader
The Google Email Uploader for Mac is a desktop utility for Mac OS X that uploads email archives from Apple Mail, Eudora, Thunderbird, and exported Entourage mail (along with other mbox and Maildir archives) to your Google Apps mailbox.

The following is echoed from the Google web site.
Google Email Uploader for Mac requires Mac OS X 10.4 or later, and a Google Apps mail account.
The application does not upload to gmail.com or googlemail.com mail accounts.
There is also an uploader for Windows. Uploads from other web-based mail applications may be done with Gmail’s Mail Fetcher.

The uploader will try to find your mail archives in their usual locations on Mac OS X :

  • Apple Mail : ~/Library Mail
  • Eudora : ~/Eudora Folder
  • Thunderbird : ~/Library Thunderbird

Download the Mac version here.

Download the Windows version here.

Windows version requires :

  • Windows XP and Vista
  • Outlook 2003 and greater for Outlook support
  • A Google Apps account
  • Microsoft. NET 2.0. (If you do not have 2.0, the program will install it.)

Google Email Uploader tips :

  1. Begin small. Due to server upload rate limits, the uploader is fast for up to 500 messages, and slow thereafter (1 message per second.) Pick a small subset of your mailboxes when first trying out the uploader
  2. Be patient. Still after uploading finishes, the server commands a while to process uploads.
  3. Do assign a custom label (this is checked by default.) This lets you effectively “undo” the uploads later by deleting all messages with the label. Deleting the label itself will not delete the mail.
  4. If you have many mailboxes in your archives, making labels for each mailbox probably is not a good idea, as this could create far too many labels.

Troubleshooting.
If the uploader does not accept your email address and password, check with your domain administrator to confirm that “User email uploads” are enabled on the administration page for Advanced Tools.