Try this: http://gmvault.org/

Thanks! I've been looking for a way to migrate from @gmail to my own domain using google apps and this looks exactly what I wanted.

I can recommend. It took about half an hour to get my full GMail the first time, and later minutes to get the backup up-to-date.

Come to think of it, I haven't actually checked if it got my emails correctly :) I should probably reg a throwaway GMail and see if I can clone my current mailbox.

I've been using gmvault for months without even a warning message. It's great.

The tool that I like to use for Gmail backups is a Python script called BaGoMa: http://sourceforge.net/p/bagoma/home/BaGoMa/

I have about 3G of mail that I sync with offlineimap; seems to work OK. How much mail do you have and what client are you using to download it?

Back when I dumped my Gmail account I wrote a little Python program using imaplib to download and save everything into a database. The script got lost with my last system upgrade since it was in a temporary directory of which I usually make no backups. It's very easy to write though, just get yourself an imaplib tutorial and hack away.

I use getmail to retrieve my gmail to my local network every week. It works fine.