In order for you to send invoices, informational messages, and marketing emails to your customers, we need access to your gmail account. This is to provide you with the best service possible. Generally, we've found that customers like to see invoices come directly from your businesses's email account, and not from a random email account like: "[email protected]" since they don't know what Lightning Service is or does. When a customer receives an email directly from your own business account, they know exactly who the email is coming from. To do that, however, we need permission to draft and send emails from your businesses account. With the permissions we request from Google, we don't any access to read or view any emails that you have in your inbox, we can only send them out. To always see what is being sent from your gmail account, you can view the "send" tab when logged into gmail. From there, you can see all invoices, informational, and marketing emails that we've sent to customers on your behalf.