Auspost.com.au mail extension with credit

A very specific question!

The mail extension you're referring to is likely the ".au" top-level domain (TLD) which is the country-code TLD for Australia. AusPost, being the national postal service of Australia, uses this TLD for their official website, auspost.com.au.

Regarding the credit aspect, I'm assuming you're asking about how to pay for services or products on the AusPost website using a credit card. Here are the general steps:

1. Visit the AusPost website at auspost.com.au and navigate to the service or product you want to purchase.
2. Add the item(s) to your cart and proceed to checkout.
3. On the payment page, select "Credit Card" as your payment method.
4. Enter your credit card details, including the card number, expiration date, and security code (CVV).
5. Review your order and payment details carefully before submitting the payment.
6. Once the payment is processed, you will receive a confirmation email from AusPost.

Please note that AusPost may have specific requirements or restrictions for credit card payments, such as a minimum order value or specific card types accepted. It's always a good idea to review the website's terms and conditions before making a payment.