in the universal email settings, what did you enter for an smtp server?
What did you enter for the form address? The form address should be a valid email address for your domain.
Who is your host? DO they support using the php mail() function for sending an email through a webscript? you should contact them to see if this is supported, if using php mail() is not supported, see if they offer support for Pear mail.
in either case, you will need to know the address of the smtp server to used.