The BackUp Gmail App needs some settings of your Gmail account.

1. Enable IMAP

The App opens a connection directly to your Gmail IMAP account, so you need to enable the IMAP access (learn more):

2. Enable “AllMail” folder access

We need to query the “AllMail” folder to get new emails. Open your Gmail settings, click on the Labels section, search “Allmail” folder and check “Show in IMAP”: