I have a Dell desktop PC that I bought approx 3 years ago.
I have been running the Windows 10 Mail App on it since I first bought it.
The App version is 16005.12827.20290.0
I use the app to access two separate Gmail accounts.
Recently the app has stopped showing sent items sent (from this device only) in the sent items window on either account on any device including this desktop. This device's sent items window DOES show emails sent from other devices on the same accounts.
Any ideas on how to resolve this?