What happens if clients reply to emails sent from the no-reply address?

Invoice emails sent via the default BQE server use a no-reply address as the sender. If any client replies to these emails, they are directed to the Reply To address set in Settings > Company > Email Settings. By default, it is set as the company owner’s email but you can change that if needed. However, if you clear the Reply To field, replies to these emails bounce back and are not received.