We have a webpage with a contact us form. The form is configured to send email to an internal address and a hotmail address. The hotmail address receives the notification, but the internal address does not. This web server is also the SMTP server. It's not joined to our domain. I can see a bunch of messages getting stuck in the queue folder for IIS. I've tried to send a message through SMTP to myself, but it fails. I'm not sure if this is an SMTP or IIS issue? Thanks for helping.