>Is there any particular reason your app can't use the Exchange server directly as its SMTP server? At least for a test, if not in production? In other words
>
>Your Outlook --> Exchange server --> Client && Works
>Your app --> local SMTP server --> Exchange server --> Client && doesn't work
>Your app --> Exchange server --> Client && ?

I don't know much about Exchange, but is it an SMTP server? We're using SMTP to send these emails in wwipstuff.