How to delete the contents of Huawei c8500 draft box?

It was a short message that opened the email, and many draft boxes appeared in the inbox. There is a checkmark to the right of the new message at the top. If you press the checkmark, there will be a checkmark option next to the message. If you press the draft box of the message you want to delete or accept the sent message, there is a deletion option below, and you can click Delete.