You can update your account details and marketing preferences any time from the client area. Quick walkthrough below.
Updating your account details
You can update your personal/business information anytime via the client area. To do this simply visit https://my.iniz.com/clientarea.php?action=details or follow the screenshot below.

Updating your marketing preference
Should you wish to, you will be able to turn on/off your marketing preference. We rarely send any marketing emails (<twice a year) anyways! From the same link as above, near the bottom of the page you will see the toggle option.

Changing your account password
You can update your password to the client very easily via https://my.iniz.com/clientarea.php?action=changepw. Please note this does not change password to your services such as your cPanel hosting login.
