Hi there, @Genesis2009.

Thank you for sharing your concern. Allow me to jump into this thread and provide some information about bounced email when sending invoices or reminders to customers.

I know how important for business owners to email invoices as soon as possible. Currently, we have an ongoing investigation (INV-72595) about this. Rest assured that our engineering team is actively looking into it very closely. 

I recommend contacting our Customer Care Support team. This way, you'll be added to the list of affected users and receive status updates.

Here's how:
 

1. Click the (?) Help icon in the upper right-hand corner of the dashboard.
2. Select Talk to a Human.
3. Enter a short description of your concern and press Enter.
4. Click I still need a human.
5. Select Contact Us to connect with our live support.
6. Choose Get a callback.
   

In the meantime, you can send the invoice manually by selecting Print/Preview, downloading the PDF, and sending it via your own email. For your reference, you can visit this article for more details: Download and save invoices, other sales forms, and statements as PDF.

I appreciate your patience as we work through this. Please know that we're always here in the Community if you have any other concerns. Feel free to reply and we'll be on hand to help, @Genesis2009.