Your address does not change
Connect the mailbox you already have. Nothing moves, and there is no new address to learn.
Alternatives
Telstra Mail carries telstra.com addresses and the BigPond addresses many Australians have had since their first internet connection. Patriot Mail opens yours in a calm inbox that is easy to read. You keep your address, and your mail stays with Telstra.
BigPond became Telstra, but bigpond.com and bigpond.net.au addresses kept working. Yours stays the same in Patriot Mail, and so does every message in it.
Telstra does not accept your account password in email apps. Generate an app-specific password in Telstra Webmail, give it a name for your device, and paste it into Patriot Mail.
Block a sender, or a whole company by blocking its domain, as many as you like at no charge. Most of what they send is deleted as it lands, and anything left goes the next time you open the app. Unsubscribe from newsletters in one tap.
Patriot Mail is free, with no subscription and no trial that ends. Your messages are not permanently stored on Patriot Mail servers, and your inbox data is not sold or used for advertising.
Yes. bigpond.com and bigpond.net.au are Telstra mailboxes. The brand changed, and the mailbox did not.
Telstra asks for an app-specific password, which you generate in Telstra Webmail and paste into Patriot Mail once.
Yes. It is free to use, with no subscription and no trial that ends.
Ready when you are
Connect the mailbox you already use and get a calmer inbox in about a minute. Free, with no subscription, and the address you have had for years stays exactly where it is.