Actually I do still have an issue with this. I think it is server config though.
Windows Server 2008
What is happening is that I cannot send an email if the Sender is not a valid email address on the domain. Even selecting Authorization and specifying the site by it's proper IP address.
set WA_MailObject = WAUE_Definition("127.0.0.1","25","","email@example.com","password","1")
That should work fine, shouldn't it?