I want to setup a non-profit I support with Outlook.com's custom domains, but, our website uses CDO's to send emails to people when they register for events.  I didn't want to risk messing up the email systems, so I bought a domain and got it setup with Outlook.com.  My question is, what smtp server do I use?  I turned on POP access to the account and when I went through the help on how to setup apps using POP it provided an SMTP address of: 
smtp-mail.outlook.com

The ports, SSL, etc... are all setup correctly.  But, when the webpage that is trying to send an email through this SMTP address runs, I get the error '80040211' which means there was a problem with the SMTP server.

Is there a way to use CDO to send emails from this website through our custom domain outlook.com?

Thanks!