WF never cared who the sender was when using sendmail, as long as I set it up using an email acct/user. But I can't seem to get that to work with OS. I just want to be certain I can't do what I'd like to do vs me having set something up incorrectly. My app sends emails using a real From address (ex, greg@myrealdomain.com) but my app domain is myacct.opalstacked.com. The restrictions around sending mail make me think I can't do that. I setup an email user and address using opalstacked.com as the domain and again with my real domain, but no luck. Am I out of luck or bad at configuring?