Not trusted server certificate about javamail-android HOT 4 OPEN

but the application in my nexus on is run well!

I get "Not trusted server certificate" error when I am trying to connect to 
exchange server through IMAP. I can get my google emails with the same method 
but not the exchange one's. 

is there a way to make android the certificate automatically? 

Here is my code: 

Properties props = System.getProperties();
        props.setProperty("mail.store.protocol", "imaps");
            try {
                Session session = Session.getDefaultInstance(props, null);
                Store store = session.getStore("imaps");
                store.connect("mail.dancorproiect.ro", "cata", "qwe123..");
                System.out.println(store);

                Folder inbox = store.getFolder("Inbox");
                inbox.open(Folder.READ_ONLY);
                Message messages[] = inbox.getMessages();
                for(Message message:messages) {
                try {
                    System.out.println(message.getContent());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        } catch (NoSuchProviderException e) {
            e.printStackTrace();
            System.exit(1);
        } catch (MessagingException e) {
            e.printStackTrace();
            System.exit(2);
        }

hey,maybe you can check your sysdate.

hey,maybe you can check your device's sysdate.