emails faint customers cant read them

Hello there, DevlinR Maguire.

I've checked for similar reported issues in our list and didn't find any. They can perform a few browser troubleshooting steps to clear stored files. Piled-up cache files can cause regularly visited sites not to function well. 

1. Let them open their emails through a private browser and check the emails from there. This is to see if the contents are shown well.
2. If it worked fine, let’s clear your regular browser’s cache to remove those files that were stored.
3. Other browsers can help us get rid of this unusual behavior. We support Google Chrome, Internet Explorer, Mozilla Firefox, and Safari browsers. 

Keep me posted on how this works. 

Hello there, @DevlinR Maguire, 

We're unable to provide you our email because we value data security in this forum. With this, I'd suggest getting in touch with our Customer Support Team. You can request them to send a mock invoice to investigate why your customers are getting emails with incomplete and missing pages. They'll be able to resolve this for you. Here's how: 

1. Sign in to your QuickBooks account.
2. Select the Help (?) icon.
3. Scroll down to select the Contact Us button and follow the prompts.
4. You will be able to request a callback or start a live chat with an expert.

For more details, you can visit this page: How to get help with QuickBooks. 

The screenshot below shows you the first two steps. 

Once fixed, you can always go to the Sales menu. Then, select the customer profile and check the Status column in the Transaction List (see the screenshot below). This helps you review the statuses of your invoices. For more information, see the How will I know if already sent an invoice? section through this article: Send An Invoice. 

I'll be right here to help if you have other concerns. See you around and take care always, @DevlinR Maguire.