the smtp server address you are entering is not valid:
if i open a dos command prompt and type:
telnet greetings.hydrangeaheavennorth.com 25
i get an error that the server cannot be connected.
double check with your host to determine:
1) Do they support sending email using the PHP mail script
2) What is the mail server address
3) Do they have a sample mail script we can examine, this may provide clues to the correct settings for Universal Email.