If the domain is registered with Infosaic:
If we are the acting registrar for your domain, then you can make Domain Name changes including MX records changes by going to your domain management control panel - http://mydomain.infosaic.com
Login with your domain name and password to modify MX records or make other domain related administrative changes.
If the domain is pointed to Infosaic's DNS:
Please open a support ticket through the control panel, and provide us with the MX information. We can input custom MX records if you have an internal Exchange or use a 3rd party like Google Mail.