Android™

Office365 Send Email using SMTP with OAuth2 Authentication

See more Office365 Examples

Demonstrates how to send email from smtp.office365.com using OAuth2 authentication. Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  An Office365 OAuth2 access token must first be obtained prior
    //  to running this code.

    //  Getting the OAuth2 access token for the 1st time requires the O365 account owner's 
    //  interactive authorization via a web browser.  Afterwards, the access token
    //  can be repeatedly refreshed automatically (with no user interaction).

    //  See the following examples for getting and refreshing an OAuth2 access token

    //  Get Office365 SMTP/IMAP/POP3 OAuth2 Access Token
    //  Refresh Office365 SMTP/IMAP/POP3 OAuth2 Access Token

    //  First get our previously obtained OAuth2 access token.
    CkJsonObject jsonToken = new CkJsonObject();
    success = jsonToken.LoadFile("qa_data/tokens/office365.json");

    CkMailMan mailman = new CkMailMan();

    mailman.put_SmtpHost("smtp.office365.com");
    mailman.put_SmtpPort(587);
    mailman.put_StartTLS(true);

    //  Use your Office365 email address for the SmtpUsername.
    mailman.put_SmtpUsername("OFFICE365_EMAIL_ADDRESS");
    mailman.put_OAuth2AccessToken(jsonToken.stringOf("access_token"));

    //  Create a new email object
    CkEmail email = new CkEmail();

    email.put_Subject("This is a test");
    email.put_Body("This is a test");
    email.put_From("MY_NAME <OFFICE365_EMAIL_ADDRESS>");
    success = email.AddTo("John Doe","somebody@example.com");

    //  Call SendEmail to connect to the SMTP server and send.
    //  The connection (i.e. session) to the SMTP server remains
    //  open so that subsequent SendEmail calls may use the
    //  same connection.  
    success = mailman.SendEmail(email);
    if (success != true) {
        Log.i(TAG, mailman.lastErrorText());
        return;
        }

    //  If SendEmail failed because of "Failed to get initial SMTP Response", then it may be 
    //  a firewall or anti-virus blocking communications.
    //  See https://cknotes.com/smtp-office365-com-failed-to-get-initial-smtp-response/

    success = mailman.CloseSmtpConnection();
    if (success != true) {
        Log.i(TAG, "Connection to SMTP server not closed cleanly.");
        }

    Log.i(TAG, "Mail Sent!");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}