Google-apps – Any easy way to migrate emails from Thunderbird to Google Apps

I've used the following tool for downloading the content of a Gmail / Google Apps mail account and restoring the emails to another account and found it works well.

Gmail Backup

Use IMAPsync. It's exactly what you're looking for. I successfully used it a few years ago. I don't know for sure about the special characters issue, since I don't have any labels with special characters, but the other issues you brought up work flawlessly. I ran IMAPsync on an underpowered GUI-less virtual server that the company I was leaving was gracious enough to let me borrow for a day or two, and successfully migrated all my mail off the company server. (We parted on very good terms.)

Anyway, I'm not sure exactly which script I used to get the job done (I may have written my own), but both of these seem like promising candidates:

http://blog.otelconsulting.com/2010/01/imapsync-to-gmail-script/ http://www.thamtech.com/blog/2008/03/29/gmail-to-google-apps-email-migration