Send javamail using Office365

Question

I'm having trouble configuring the SMTP settings for sending mail using javax.mail (1.4.4) through Office365, so I thought I'd post the properties here for others.

Solution 1

Use Office365 smtp details as below:

private static Properties props;  
private static Session session;   
static {      
  props = new Properties();
  props.put("mail.smtp.starttls.enable", "true");
  props.put("mail.smtp.port", "587");
  props.put("mail.smtp.host", "m.outlook.com");
  props.put("mail.smtp.auth", "true");        
  session = Session.getInstance(props, new Authenticator() {          
      @Override
      protected PasswordAuthentication getPasswordAuthentication() {
          return new PasswordAuthentication("office365 email address",
                  "office365 password");          
      }       
  });

}

Solution 2

And with spring-boot, you simply need to add this to your application.properties:

spring.mail.host = smtp.office365.com
spring.mail.username = [email protected]
spring.mail.password = s3cr3t
spring.mail.port = 587
spring.mail.properties.mail.smtp.auth = true
spring.mail.properties.mail.smtp.starttls.enable = true

Solution 3

A working code example:

Email email = new SimpleEmail();

email.setHostName("smtp.office365.com");
email.setSmtpPort(587);
email.setAuthenticator(new DefaultAuthenticator("[email protected]", "****"));
email.setStartTLSEnabled(true);
try {
    email.setFrom("[email protected]");
    email.setSubject("Job Failure");
    email.setDebug(true);
    email.setMsg("This is a test mail ... :-)" );
    email.addTo("[email protected]");
    email.send();
} catch (EmailException e) {
    e.printStackTrace();
}

Comments

[Bilbo Baggins]

The problem I am facing is my thread got stuck before sending mail, I tried many solutions from internet non of them worked, I don't get any exception too. I am unable to send mail, it would be helpful if you share your knowledge.. :) thanks

[Glorfindel]

For me, this only worked after I changed 587 to "587". Otherwise, JavaMail tried to connect over port 25.

[JBert]

It would be better if the code in this answer were to use setProperty(String, String), this way you don't run into the problem @Glorfindel describes. Also, the Authenticator is not necessary if you use transport.sendMessage(...) on a Transport instance for which you called connect(server, user, password) first.

[JBert]

You might want to specify that this uses commons-email.

[Emman Sun]

I'm also facing thread stuck issue: DEBUG SMTP: trying to connect to host "smtp.office365.com", port 587, isSSL false

[drvlas]

@JBert : how can we create an instance transport of the abstract class Transport? Should we create a new child class?I have an issue with smtp.office365.com (Unknown server) and I'd like to separate connection and authentification from sending - as a debug. So your proposition to call connect() is interesting for me. Thanks!

[Dordoka Maisu]

@Glorfindel Thank you so so much! This fixed my thread stuck issue. How the hell can this happen?