Who is you host?
In Universal Email, have set it to redirect to another page after sending the email? if so, does it redirect?
What have you entered for a from address? Some hosts require that the from address be a valid email address for your domain.
Aslo make sure that you are not using the same address for the from address and the to address.
what have you entered for the SMTP Server address? in some cases, this can be left blank, but some hosts require that you enter an address.
also, depending on the host you may need to use the Pear Mail for SMTP mail object instead of the standard PHP Mail object or set the option to include the from address as an extra parameter.