Okay....I'm back. I'm still struggling with the same problem.
It would be great if my users could truly authenticate themselves (e.g. not having to entier their email user/password through the Method admin screens) for sending emails. The main reasons: 1) sent emails show up in their Sent Items folder and 2) should an email to a customer bounce, they get notified of this.
So my original question still stands: How can I allow my users to set up their own emails prefs so I (as Admin) don't have to enter their email user/pass in the Method admin user settings?
Am I still missing something?