How to check if an incoming email is duplicate in Inbox using javamail IMAP

How to check if an incoming email is duplicate in Inbox using javamail IMAP

Now I would like to check if an incoming email is duplicate via IMAP using
javamail, which may mean one email equals others that they have the same
Subject,From,To,CC,BCC,Body,Attachements.But I donnot find any APIs to
support this.
So can anybody tell me how to do this. any ideas are much appreciated.Thanks