Database design for email messaging system

Question

I want to make an email messaging system like gmail have. I would like to have following option: Starred, Trash, Spam, Draft, Read, Unread. Right now I have the below following

Answer 1

You could create a table for MessageContacts which joins each message to the people who have it in their mailboxes. When a user deletes a message then a row gets deleted from MessageContacts but the original message is preserved.

You could do that... but I suggest you don't. Unless it's an academic exercise set by your tutor then it is surely a complete waste of time to develop your own messaging system. If it is homework then you ought to say so. If not, then go do something more useful instead.