Send Mail via Java Api for Office 365

Question

Hi i am currently developing java application which will send mail to multiple recipients via Java Mail Api(1.6.2), i have configure the SMTP as per the Microsoft docs problem is the code is working with my personal hotmail email id but it fails for corporate office 365 account.

Error : javax.mail.AuthenticationFailedException: 535 5.7.3 Authentication unsuccessful [PN1PR0101CA0066.INDPRD01.PROD.OUTLOOK.COM]

POP and IMAP are working(Receiving mails) and i can login with the password in Office 365 Web, i have tried changing password too.

Code :

User user = Credentials.ACC;
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.office365.com");//outlook.office365.com
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "587");//25
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.transport.protocol", "smtp");
//props.put("mail.smtp.ssl.enable", true);

Session session = Session.getInstance(props, new Authenticator() {
    @Override
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(user.getUsername(), user.getPassword());
    }
});
session.setDebug(true);

try {
    MimeMessage msg = new MimeMessage(session);
    msg.setFrom(user.getUsername());

    msg.setRecipients(Message.RecipientType.TO,
            "[email protected]");
    msg.setSubject("Testing SMTP using [" + user.getUsername() + "]");
    msg.setSentDate(new Date());
    msg.setText("Hey, this is a test from [" + user.getUsername() + "], Sending via Java Mail API");

    Transport.send(msg);
    System.out.println("Sent Ok");
} catch (MessagingException e) {
    System.out.println("Something went wrong");
    e.printStackTrace();
}

Start by simplifying your code by fixing these common mistakes. Are you using the same user name that you use with the web UI? Can you configure Thunderbird to login with the same username and password? — Bill Shannon
Yes I am using same user name as the web and in thunderbird it gives SSL/TLS erro — Vineed Gangadharan

Sello Motloung Sello Motloung · Accepted Answer · 2020-09-09T11:18:43

public class EWS {

    private static ExchangeService service;
    private static Integer NUMBER_EMAILS_FETCH = 5; // only latest 5 emails/appointments are fetched.

    static {
        try {
            service = new ExchangeService(ExchangeVersion.Exchange2010_SP1);
            service.setUrl(new URI("https://outlook.office365.com/EWS/exchange.asmx"));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Initialize the Exchange Credentials.
     */
    public EWS() throws Exception {
         ExchangeCredentials credentials = new WebCredentials("User Name", "Password");
        service.setCredentials(credentials);
    }

     /**
     * Reading one email at a time. Using Item ID of the email. Creating a
     * message data map as a return value.
     */
    public Map readEmailItem(ItemId itemId) {
        Map messageData = new HashMap();
        try {
            Item itm = Item.bind(service, itemId, PropertySet.FirstClassProperties);
            EmailMessage emailMessage = EmailMessage.bind(service, itm.getId());
            messageData.put("emailItemId", emailMessage.getId().toString());
            messageData.put("subject", emailMessage.getSubject());
            messageData.put("fromAddress", emailMessage.getFrom().getAddress());
            messageData.put("senderName", emailMessage.getSender().getName());
            Date dateTimeCreated = emailMessage.getDateTimeCreated();
            messageData.put("SendDate", dateTimeCreated.toString());
            Date dateTimeRecieved = emailMessage.getDateTimeReceived();
            messageData.put("RecievedDate", dateTimeRecieved.toString());
            messageData.put("Size", emailMessage.getSize() + "");
            messageData.put("emailBody", emailMessage.getBody().toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return messageData;
    }
    /**
     * Number of email we want to read is defined as NUMBER_EMAILS_FETCH,
     */
    public List<Map> readEmails() {
        List<Map> msgDataList = new ArrayList<>();
        try {
            service.setTraceEnabled(true);
            System.out.println("|---------------------> service = {}" + service);
            Folder folder = Folder.bind(service, WellKnownFolderName.Inbox);
            FindItemsResults<Item> results = service.findItems(folder.getId(), new ItemView(NUMBER_EMAILS_FETCH));
            int i = 1;
            for (Item item : results) {
                Map messageData = readEmailItem(item.getId());
                System.out.println("|---------------------> service = {}" + (i++) + ":");
                System.out.println("|---------------------> service = {}" + messageData.get("subject").toString());
                System.out.println("|---------------------> service = {}" + messageData.get("senderName").toString());
                msgDataList.add(messageData);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return msgDataList;
    }
    public static void main(String[] args) throws Exception {
        EWS msees = new EWS();
        List<Map> emails = msees.readEmails();
        System.out.println("|---------------------> service = {}" + emails.size());
    }
}

Send Mail via Java Api for Office 365

2 Answers