Install it and forget about it
A lightweight Status Bar App that works in background, BackUp Gmail connects automatically with your account and backs up any new messages.
Plain text data
You can access your data whenever and wherever you want. All emails are in plain text (.eml format) and the relationships are stored in a SQLite DB.
Set Folder and Schedule
You can personalize how the backup is performed and set-up your destination folders as you wish. You decide if you want an hourly or daily backup of your account, and set the times yourself.