Gmail Backup Archives Your Email Account
Windows/Mac/Linux: Gmail Backup saves and restores complete archives of your Gmail email account using Gmail’s built-in IMAP capability. The Windows version comes with a simple graphical interface — just enter in your email address and password, select a backup folder, and click the Backup button. It will save your messages in Microsoft’s EML format complete with attachments.
more @ http://lifehacker.com/5075460/gmail-backup-archives-your-email-account