HELP Need to change my administration email - not receiving emails

Ok, so i setup mail administration as admin@phoenixapparelstudio.com but i need it to be info@phoenixapparelstudio.com - I can't see a way to change this.

Also, when i now send emails to info@phoenixapparelstudio.com i get an error:

" Delivery to the following recipient failed permanently:

info@phoenixapparelstudio.com

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain phoenixapparelstudio.com by mx.zohomail.com . [74.201.154.201].

The error that the other server returned was:

550 5.1.1 < info@phoenixapparelstudio.com >... User unknown"

Is that because I'm still waiting on the mx change or have i messed it up some other way