Your website is not hosted with Google so you need to change the MX record of any “local” mail exchanges so that, for example, a form that goes out from the domain does actually go out to the mail exchanges at Google’s servers and doesn’t get trapped in a local loop. Here’s how to change the MX record for the domain using cPanel.
About the Author: Bradley Charbonneau
I've done the big corporate thing. I've done the creative writer thing. Now I'm happily in the middle. I like to help small businesses who are interested in "working their website before their website works them." I'm also interested in creating beautiful sites with powerful WordPress themes. Google+