Yes, you can. The only exception is if your email address is linked to your current Broadband provider (e.g. Spark), in which case there may be an additional cost involved. Please check with your provider to understand if there will be any additional costs.
If you have a Gmail, Outlook, Yahoo or other cloud-based email address there will be no issues at all.
We strongly suggest that you set up an email address with a free provider (such as Gmail, Outlook or Yahoo). This way you will not be locked into your current Broadband provider. When setting up your new email address, you can create an automatic response that lets people know you have changed your email.