The problem will be will you have a Telstra email address. You will need to keep a Telstra internet service to retain a Telstra insternet addrees.
Have a look a this previous post by @petergdownload although it talks about Optus email addresses the solution applies to Telstra as well:
If it's Bigpond, You can keep your email address for a year free of charge and it will download to your emails through your Optus modem/account. I've just done this. Beyond a year, there is an annual fee to keep the email address active from Bigpond - approx $70-80 per year I think. I set it up quite easily with Bigpond.