you probably need to enter the SMTP Server address in Universal Email
on the server behaviors panel, double click the Universal Email server behavior to edit it, click the Envelope Icon to go to the SMTP Server settings panel, on this screen you can enter the SMTP Server address.
if the SMTOP Server requires authentication, then you will need to change the mail object to Pear Mail using SMTP, enable authentication and enter the user name and password.
If you are unsure of the SMTP Server address, or whether authentication is required contact the host.