How to set up an email in Sage 50 Premier Accounting

I have had sage set up to send emails to customers. But we are changing our email. So I am wondering if anyone can help me with how to set this up. I went into setting --- information and put in my new email but when I hit send noting to happen it just keeps going in circles. and I am getting this message. My email is a GMAIL account. also using windows 10. I hope someone can help me.

Thank you in advance