Thanks for the additional details. We'd like to confirm if you're able to log-in to our post office. Please expect one of our Technicians to contact you tomorrow between 10-12NN AEST to provide updates related to this issue.
I have this problem also. I cannot send emails from one of my email addresses because of the "User ###@tpg.com.au is banned from using SMTP AUTH due to previous abuse" error. The email address in question, ###@tpg.com.au, is one of my slave email accounts (I have substituted "###" for my slave account username).
TPG's instructions (here) are to change the account password online at https://www.tpg.com.au/home/myaccount, however it is not clear which account password has to be changed in the case where a slave email account is the one being blocked.
In my case, I logged into My Account using my slave account username and password and changed the password there. But, even I after many days, I am still unable to send email from the slave email account.
I have also logged into the Post Office with the Username and Password of the slave email account and changed the password there. But I am still unable to send email from the slave account.
Account settings and test email results are attached.
Thanks for getting back to us, @timelord. Please send us a private message with your TPG customer ID, username and complete address so we can pull up the account.
Please also include the email address you're having issue with.
To send a PM, please refer to this link: How do I private message (PM) in the community