Go to page in InExchange Network: Account\Profile
To change contact information you need to be logged into InExchange Network.
Therafter, go to the Account page. See picture below.
There are also several different roles for the e-mails InExchange sends. What roles that are available vary depending on the choice of service. If no specific roles are set, all e-mail will be sent from InExchange to the e-mail address listed under General.