This does not show the error. All it shows is "Bounced Email". This is not an acceptable error message to assist in resolving any fault.

Quickbooks really needs to get people with technical skills on their support teams, rather than people who just keep copy pasting the same junk from their internal knowledge base.

When a receiving server bounces an email, it replies to the address listed in the "Return-Path:" header, this is a @e.notification.intuit.com email address. In that reply it gives the **exact** reason it rejected the email. Quickbooks should be providing those errors to their users.