NOTE: If you have more than one gmail account, when you click below, make sure it takes you to the email address settings you need to change.
1) Click here to go to your gmail label settings and click "Show in IMAP" for All Mail and Sent Mail as you see below. This setting needs to stay this way permanently.
2) Click here to go to your gmail IMAP settings and click "Do not limit" as in the second screen shot below. This setting change is temporary for users with desktop clients and you can revert it to "limited folder sizes" immediately after your ContactRescue is complete.