to cancel messages

[Android Question]

On my android cubot mtk6589 i have some messages remaining in the box after having canceled messages with the computer; i want know how to cancel those messages remaining in the memory of the phone that i can't cancel with the computer because i can't see them with the computer

 

[Rukbat]

Text or email? If email, POP3 account or IMAP account? Messages you sent or messages you received?

It all matters, so create a free account and answer in this thread (so people don't have to search all over the forum to see what the original question was).