1) Login to your Earth Class Mail account from a desktop or laptop.
2) Click on the Settings Icon 
3) Select Account Management and the Billing tab 
4. Click on Billing Portal 
5. Your billing address is listed under Billing Details. To change the listed billing address, select Update Payment Method. This will allow you to update your billing address and/or credit card information.
6. Click Save to save your changes. 
** remember that these changes can only be made by an administrator (admin) on the account **