Opera mail client

Friends! I appeal to you for help - please tell me, is there really no function in the mail client of our favorite browser to delete messages from the server? Those. for example, I received a letter, read it, and deleted it ... There is a function of deleting messages from the server after downloading them by the client, but I didn’t find all the settings several times, something like “delete from the server when moving from the Inbox folder” . Did the developers not provide the client with such an obvious and useful function?