According to this email, which purports to be from Australian telecommunications giant Telstra, your account payment method has expired.
The email urges you to click a log in button to update your payment method and continue using the service.
However, the email is not from Telstra. Instead, it is a phishing scam designed to steal your personal and financial information.
If you click the button, you will be taken to a fraudulent website that has been built to emulate the genuine Telstra website. Once on the site, you will be asked to log in with your Telstra account credentials and then provide your credit card details, address and contact details, and other identifying information.
This information will be collected by criminals and used to commit credit card fraud and identity theft.
It is always safest to login to your online accounts by entering the address into your browser’s address bar or via a trusted app.