Edit Zone Settings - Exchange 2010

Hi,

I need to setup my Domain Zone Settings in order to receive email through my Exchange 2010. This is the default setup from my Domain Provider:

Name      Ttl      Class      Type      Spec
www.hchd.us      86400      IN      MX      1st  mail-fwd.mx.g17.rapidsite.us
hchd.us      86400      IN      MX      0    mail.hchd.us
hchd.us      86400      IN      A      198.65.225.158
ftp.hchd.us      86400      IN       A      198.65.225.158
smtp.hchd.us      86400      IN      A      198.65.225.158
webmail.hchd.us      86400      IN      A      198.65.225.158
www.hchd.us      86400      IN      A      198.65.225.158
mail.hchd.us      86400      IN      A      65.88.110.90
                        

Outside mail is forwarded to 65.88.110.90 which is re-routed when it goes through the PIX. I am able to send out email with no problems but I am not able to receive any incoming email. What do I need to do?