Je hebt te rechtsklikken op uw account en abonneer (Google translate)

Google translation wasn't right

Your Q: My trash is gone, how do I get it back? How do I get back my lost trash folder?

Or do you want to undelete deleted mail gone from trash folder?

What I said was: You have to right click on your account and subscribe.

The problem is my whole trash folder is gone

If its a IMAP account do as I said.

• Right-click on the account name in the list on the left
• choose subscribe
• select trash

A POP-account should recreate its trash-folder automatic.