This can be annoying that when you are trying to reset your Bigpond password, the reset link is sent to the same Bigpond email account that you are trying to access. In this case, it is advisable to employ another recovery measure like the secondary email address or registered mobile number if these details were provided during the registration of the account. If a secondary email address or mobile number has been provided, access the Telstra login page, click on “Forgot Password?” and complete the procedure to have a password reset link sent to the secondary contact information.
In case none of the alternate contact methods have been set up, your next step is to get in touch with Telstra customer service. Ring up Telstra support and describe the problem you have, making sure you provide your account details for verification. Further information such as the account number, previous bill, and other identifying information may be requested. After confirming your identity, the Telstra support team will be in a position to help you reset the password or provide you with other means to gain access to your account.

More Info: https://www.bigpondonlineservice.com/blog/how-to-reset-bigpond-telstrausername-or-email-password/

More Info: https://www.bigpondonlineservice.com/blog/reset-password-for-bigpond-email/