First, you need to create a special password for email logins in CRM

Click the link https://myaccount.google.com/apppasswords to create a password for email logins in CRM

Login Google Mail 

Then enter the type of application, e-mail

Select the device that is custom, then fill in Barantum CRM

Then you will get a password like the following, save the password first

Then open the email menu on Barantum CRM, click Setup My Mailbox

Then fill in the form in accordance with the following configuration

Then press Save, then you can then see the inbox in your email