I've setup a non domain user to use my exchange server's SMTP to sendmail. But I can't send mail outside of the domain.
I can send mail to people inside the domain.
I'm guessing this has to do with authenticating SMTP, but I'm not sure what to check in the exchange server to see if that is turned on.
Also, when authenticating SMTP, do I have to authenticate with an account that has the same alias as the address in the SMTP message?