If you like to import all existing email messages and contacts from Microsoft Outlook (or Thunderbird) into your online Gmail account, Google has a free utility for you.

The Google Email Uploader is a open source desktop utility for Microsoft Windows. It uploads email and contacts from desktop email programs (like Microsoft Outlook® ) into your Google Apps mailbox. It preserves information such as sent dates and sender/recipient data, as well as the folder structure used by email programs.

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