Mail Activity - unauthenticated

I am trying to automate a simple send Exchange mail activity, in my company we have an open relay so if a request is unauthenticated it will just perform the request, is it possible to specify no authentication in an exchange activity?

Hi @jasonsavory,

Have you already tested it with the Send Exchange Mail Message activity?

Yes, we’ve tried it just the send activity, and inside an exchange scope - neither is successful. If I connect direct to the server via my browser and log in it opens an outlook web app.