There are two ways to delete an email.
Option 1. Hover over the email you are wanting to delete. Once you are hovering over the email, four icons will appear on the right side of the screen on the same line the email is on. Click the one that looks like a trash can. This will delete the email
Option 2. Click on the email you want to delete. Once the email is up, there will be many icons at the top of the screen. Click the one that looks like a trash can. This will delete the email.
To recover an email, start by going to the left side of your screen and click where it says "more". Next, click where it says "trash". This will take you to your deleted email. Click on the email you want to recover. Then, you will see the icons at the top of your screen again. Click the one that looks like a folder with an arrow in it. If hovered over, this will say "move to". A drop down menu will open up and you will click the option that says "inbox". This will send your email back to your main inbox.