It was a bit tricky to set up CS-CART to work with the G-Suite account. However, after getting it working, I wonder why google keeps CS-CART as a "less secure app"? I did set up all email traffic via SSL (CS-CART), and it looks like it works.
Is there anything else to set on CS-Cart and raise the security level on google G-Suite admin?
I'd like to keep security issues well maintained without this kind of warnings.