JavaMailUsingOAuthForOffice365 ·

Send and read emails using OAuth2 in Java for Microsoft Office365 or Outlook

Objectives

A very few resources with a complete set of MS configurations and a sample project are available online to send and/or read emails through Microsoft Office365 or Outlook using OAuth2 in Java. Thus, the primary targets are:

• to provide the guidelines for the MS configurations for sending emails through Microsoft Office365 or Outlook in Java using OAuth2 (i.e., using SMTP AUTH command)
• to list down the the MS configurations for reading emails from Microsoft Office365 or Outlook in Java using OAuth2

Pre-requisites: Setup Email SMTP Settings for Office365 with OAuth2 Authentication

1. A step by step setup guideline is available here.

2. Once we complete the setup, we shall copy the following items from Azure Portal

   - Application (Client) ID
   - Directory (Tenant) ID

Setup the Java project

1. We can setup this project by any of the following two options

   • Import this java project into IDE (e.g., eclipse) as a gradle project
   • Prepare this java project for eclipse by following command and then open the project into IDE

      gradle eclipse

2. Change the following configurations into application.properties under src/resources We will need Application (Client) ID, Directory (Tenant) ID, redirectUrl, sender email address and receiver email addresses here

   clinetId=<YOUR_REGISTERED_APP_CLIENT_ID>
   userName=<YOUR_OFFICE365_EMAIL_ADDRESS>
   authEndpointUrl=https://login.microsoftonline.com/<YOUR_TENANT_ID>/oauth2/v2.0/authorize
   scopes=offline_access,openId,https://outlook.office.com/SMTP.Send
   redirectUrl=http://localhost
   toAddresses=<TO_EMAIL_ADDRESSES>

3. Run the following Java class file

   	org.zahangirbd.email.EmailSender

   • It will collect accessToken of OAuth2 using default browser with the given redirect URL
   • It will use the accessToken for SMTP AUTH for sending email
   • It will send an test email to the provide toAddresses mentioned in application.properties