When I used to use outlook 2013, I used the say all command to read messages. I don’t know of a way to get NVDA to read out messages automatically.

Sent from Mail for Windows

Sometimes NVDA only reads the first line of an email in Outlook 2019 desktop but sometimes the same email will be read entirely.  I use down arrow to select the email to read and then hit ENTER to bring up the read window.  
I seem to be missing something here.  Does anyone know how to make NVDA read entire emails after hitting ENTER?  I realize that I could use "say all" but would prefer to keep the required inputs to a minimum and to have consistency.
Thanks for this great resource!

NVDA 2021.2
Windows 10  Version 10.0.19042 Build 19042