Can I view a covering email sent with an invoice after it has been sent?

Hi rlrcowley,

We won't be able to retrieve the message entered on the invoice email once you've sent it to your customers. However, you can enable an option on your settings wherein you will receive a copy of the email and invoice sent to your customers moving forward.

Here's how to enable this feature: 

1. From the Gear icon, select Account and Settings.
2. Select Sales.
3. On Messages section, tick Email me a copy at (your email address).
4. Select Save and Done. 

Let me know if you have any other questions. Have a nice day.