Example of javax.mail and Office 365 and SMTP send with OAUTH / XOAUTH2

This program is an exampl of javax.mail and Office 365 and SMTP send with OAUTH / XOAUTH2. We ask user to log in and then we get access token and refresh token. I just use access token.

This program is for Desktop applications made with Java but no UI here just proof of concept.

It uses XOAUTH2 authentication to send email It should work event with MFA

Remember to create file config.properties (in main/resources) copy config_example.properties you need

##Register applicaton in Azuze Go Azure https://portal.azure.com and there App Registrations

Here you have to create new app for your desktop app

###Go page In Authentication page

Go page

In Api permission page you should give read permissions maybe also question marks.

I'm using SMTP but Microsoft recommends Graph API.

To respect Jon Postel I prefer STMP :-)

TODO:

• create token cache real so that it's not asking password every time

Sources: https://docs.microsoft.com/en-us/exchange/client-developer/legacy-protocols/how-to-authenticate-an-imap-pop-smtp-application-by-using-oauth#register-your-application