Why does my email trash bin always show empty?

[AC Question]

My email trash bin always shows empty even when I know I have sent unwanted emails to the bin. This is on my android tablet. This is new. It always worked before. What may be going on and how do I fix this?

 

[ManiacJoe]

Sounds like your email app may be emptying the trash when you close the app, a common thing to do.
Which email app?