Invalid Address, ERROR_CODE :553, ERROR_CODE :Relaying disallowed

please help. =o(

Hi,

I just added our domain name to our zoho account.  Domain name has been verified.  I have made the domain name primary.  I've added new email addresses to each user and set the new primary email for each user.

I can send out email using the new primary domain but i cannot receive emails.  I get this bounce back from my personal email   

This message was created automatically by mail delivery software.

 A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. 

[receiver@domain.com] Invalid Address, ERROR_CODE :553, ERROR_CODE :Relaying disallowed

 Received:from 172.29.249.242 (172.29.249.242 [172.29.249.242]) by mx.zohomail.com

                with SMTP id 1313957366199168.58709211691814; Sun, 21 Aug 2011 13:09:26 -0700 (PDT)  Message-ID:<131edf648e2.1719634041350244667.7882087836298811452@domain.com>

 Date:Sun, 21 Aug 2011 13:09:25 -0700

 From:"sender name" <sendername@domain.com>  User-Agent:Zoho Mail  To:"receiver(receiver)" <receiver@domain.com>  Subject:test linda  Content-Type:multipart/alternative;

                boundary="----=_Part_63026_1282640876.1313957365984"