My postbox is full now - How I could delete some letters?
Go to your Mailbox
Mark the messages to be deleted by clicking at the left side of every message to be deleted.
At the bottom you see "X Nachrichten markiert" aka X Messages marked
Click on and then displays a small field with :
Herunterladen = download
Löschen = eliminate
Demarkieren = quit the marking
Click on Löschen
A Window appears with the question if you reaaly want to eliminate the messages , click "yes".
at the left side you see "Papierkorb" aka trashcan.
There are now the eliminated messages
Click on "Papierkorb"
Click on "Papierkorb leeren" (Empty trashcan) at the right site of the messages.