Mail Relay Problems

I have my SMTP Proxy set up on my ASG and I can send eMails. However, I am not receiving any eMails to my Zimbra server. I can see in the eMail Security Statistics that the ASG is properly receiving them though. Do I need to set up something else along with the proxy to have the eMail traffic properly routed to the server?

I want to verify all my info and assure that I have everything set up properly on the ASG before I jump over to the Zimbra forums.

I used the links below to set up my SMTP Proxy:
http://www.astaro.org/astaro-gateway...e-edition.html
http://www.astaro.org/astaro-gateway...fall-spam.html
http://www.astaro.org/astaro-gateway...-anywhere.html[SOLVED] Not receiving external mail

Thanks for any help.