Hello there, @newby3_.

You can  customize your contact list to show the list of your constant contact. I can guide you on how to do it.

1. From the Customer Contact List report, click the Customize Report button.
2. Expand the Filter section.
3. Click the Customer drop-down. 
4. Mark the names of your constant customers. 
5. Click the Run Report button.

You can now download the list. Also, you can save the customization you've made for future use.

On the other hand, when sending multiple emails from the Customers tab, you'd want to select only those specific customers  you need. This way it will only display the emails you need.

I've added these articles to learn more about managing your data in QuickBooks:

• How to email or print an invoice 
• Email or print multiple invoices and sales forms 

Get back to us here if you have other questions or concerns. I'm always here to help.