Check with your host to have them look into the SMTP server error logs to see why it is not being relayed for the shoppers email address. If it is being sent to the other emails, there is something on the host preventing it from being sent tot he shoppers email or it is being trapped in a spam filter. 
I am the host. It is my server. There are no errors generated. If "test@test.com" is used as either the CC or BCC the email is received. If that same email address is used as the shopper's email, and others are used for cc and BCC, the shopper email is not sent. The shopper's email for Email verification and Registration emails is never sent. It is not trapped in the spam filter.
I do not think Powerstore is picking up the shopper's email address from the registration form when it is filled out by the shopper.
--rayne


