Java: using Javamail to read email

I am working on a program that, let's say, uses javamail to read in the inbox, and if the email contains a specific string, it should be opened.

Firstly this is my first time trying to use this javamail api. I'm sure my properties are all tainted. Can anyone give me some advice on how to properly configure javamail properties?

Second, I feel like I can connect via the API, but if I try to find topics and the topic is null, I get a null pointer exception. If I, however, do not try to match the theme to "Ordretest", I am not getting nullpointer - any advice would be of great help :)

package vildereMail;

import java.util.Properties;

import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.InternetAddress;
import javax.mail.search.FromTerm;
import javax.mail.search.SearchTerm;
import javax.mail.search.SubjectTerm;

public class vildereMail {


    public boolean match(Message message) {
        try {
            if (message.getSubject().contains("Ordretest")) {
                System.out.println("match found");
                return true;
            }
        } catch (MessagingException ex) {
            ex.printStackTrace();
        }
        return false;
    };
        public static void main(String[] args) {
            Properties props = System.getProperties();
        props.setProperty("mail.store.protocol", "imaps");
            props.put("mail.imap-mail.outlook.com.ssl.enable", "true");
            props.put("mail.pop3.host", "outlook.com");
            props.put("mail.pop3.port", "995");
            props.put("mail.pop3.starttls.enable", "true");
            try {
                Session session = Session.getInstance(props, null);
                Store store = session.getStore();
                store.connect("imap-mail.outlook.com", "myEmail@live.dk", "MyPassword");
                session.setDebug(true);
                Folder inbox = store.getFolder("INBOX");
                inbox.open(Folder.READ_ONLY);


                SearchTerm sender = new FromTerm(new InternetAddress("myMail@live.dk"));

                Message[] messages = inbox.search(sender);
                System.out.println(messages);

                for (int i = 0 ; i < messages.length ; i++) {

                    System.out.println(messages[i].getSubject());
                    if (messages[i].getSubject().equals(null)) {
                        System.out.println("null in subject");
                        break;
                    }
                    else if (messages[i].getSubject().contains("Ordretest")){
                        System.out.println("1 match found");
                    }
                    else {
                    System.out.println("no match");
                    }
                }
                System.out.println("no more messages");
                store.close();

            } catch (Exception mex) {
                mex.printStackTrace();
            }
        }
    }