Hi Texttures — If you want to create an email address using your custom domain, and then link it with your Gmail account, you first need to create your business email address. We show you how to do that in this guide. Then, you can follow the steps on page one of this forum conversation to link your gmail account.
Hi Donovan — Thank you for sharing. Here is a guide that explains how to disable two factor authentication for anybody else who is having this issue (getting authentication and timeout errors.)