Well, I am a bit of a fool. I got that part fixed, and everything installed ok, but now...
With the client all set up (in this case outlook express) i get this error when trying to send an email from a different network:
The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'someemail@someplace.com'. Subject 'Test from outlook', Account: 'mail.mydomain.com', Server: 'xx.xxx.xxx.xx', Protocol: SMTP, Server Response: '553 Sorry, that domain isn't in my list of allowed rcpthosts.', Port: 465, Secure(SSL): Yes, Server Error: 553, Error Number: 0x800CCC79
I setting this stuff up was all that needed to be done to get remote access to smtp all setup. Is there another step not in the instructions?