Gmail

At the beginning, it's important to enable IMAP access before adding the settings:

NOTE: If you want to connect with Gmail, Outlook, or Yahoo, you will need to use an application password.

Please check the following instructions to learn how to create an application password:

Gmail

If you are using a business account, the configuration may require additional permissions from the administrator.

Enable two-factor authentication (2FA) here.

Allow users to manage their access to less secure apps

Then, enter the data here (Password is application password):

You can choose how old messages you want to sync.

The next step should looks like this: