Slave email is a separate account that has it's own inbox. Aside from your main TPG account, more email accounts can be created. Here's how to create a slave account:
1. Go to https://cyberstore.tpg.com.au/your_account/
2. Log on using the main account and the appropriate password.
3. Look for Email Management. Click Manage Your Email Accounts.
4. Click Add Slave User.
5. Enter your desired username and password. Click Create Account.