Hello Lacasabiancawinery,
Welcome back to the Community. It's important you're able to navigate QuickBooks with ease. Rest assured, I'll be happy to share info so you're on the right track with achieving your goals.
To make sure we're both on the same page, have you been able to go through the Gmail link you provided above? Also, are all customer emails affected or is it a specific one? I also recommend reaching out to the customer and informing them that their email address isn't receiving emails. Issues like these can be caused a firewall that the customer may have installed.
I look forward to hearing back from you. I'll be one message away.
