Hello Guys,
I am one of the development team member and would like to share a simple solution for Gmail backup or IMAP backup, Use Beyond Inbox
http://www.beyondinbox.com/ , which lets you keep your email organized and inbox clean so that you can find a message when you need it. At the same time, you also need to make sure that you archive and backup your email to prevent the loss in situations like accidental loss of data from email servers, hacking of account, forget password, over size inbox or unpredictable scenarios.
There are five basic functions that we all need to perform in order to manage and safeguard our email- backup, restore, archive, transfer email to another IMAP account and organize the data. Beyond Inbox can help you perform all of these in a very efficient and easy way.
Using Beyond Inbox, you can backup, restore, archive, transfer or organize email from any IMAP enabled email account.
It makes a single file(.eml) for each downloaded mail, so that you can see the relevent mail through any other email Client application like MS Outlook, Thunderbird etc.
Beyond Inbox is available in two different flavors i.e. an easy User Interface using which you use all its feature like backup ,restore,copy and move and Command line interface using which you can schedule the task of gmail backup or IMAP backup .
You can use this tool on Windows, Linux as well as Mac OSX. Click here to download
http://www.beyondinbox.com/beyondinbox-download.html