GmailStore store = (GmailStore) session.getStore("gimap");

store.connect("imap.gmail.com", "[your-account@gmail.com", "[your-pw]");

GmailFolder inbox = (GmailFolder) store.getFolder("[Gmail]/All Mail");

inbox.open(Folder.READ_ONLY);

Message[] foundMessages = inbox.search(new GmailRawSearchTerm("to:somebody@email.com"));