If the call to the Microsoft Graph API fails currently a response object is returned. This is normally not logged anywhere so a normal Drupal user will just end up with mails that never arrive if there is an issue with for example the sender address.
Send an email with a sender that the Graph API account is not allowed to send emails as. This will silently fail, and the mail never arrives.
Throw a TransportException like other transport implementations do when there is an error, instead of returning a response object. A patch is attached that does this.
Active
1.0
Code
This is included in the latest release 1.0.5. Thank you for your contribution
Automatically closed - issue fixed for 2 weeks with no activity.