Not receiving emails

I just updated to wordpress 3.5 and updated to the latest version of contact form 7. I am testing out the form before we go live. Currently we are using the ip address for all things as there is a splash page up that has a sign up form. We use rackspace for hosting. I get the “message has been sent” in the green box but nothing is sent to my defined email address. Could the ip thing be the issue or does that have nothing to do with it. I also installed configure smtp but that did not make it work. I basically want to know if the ip has anything to do with it and if I should go live with the site before I worry about fixing this issue. Thanks for your help.

https://www.ads-software.com/extend/plugins/contact-form-7/