So I've recently been pointing all email to Godaddy. However, Godaddy has serious problems with blocking emails that are generated from website forms. (the same forms can easily carbon copy to my Gmail account). They just never arrive. This happens on Wordpress, Joomla, and other types of sites.
Then you need a reverse dns *there*.
Either way - this is outsdie the scope of theme support but I'll leave this open for other community members to chime in.
These forums were CLOSED to new posts on November 19th, 2012. New forums are here: http://www.studiopress.com/forums/
and you will need to SIGN UP AGAIN.
If you need assitance with setting up your theme, go to http://my.studiopress.com/
and read the SETUP links or the TUTORIALS link on the side tab.
If you need Account Assistance
, file a help desk ticket at the same location.