Get online support
On this page: https://support.tpg.com.au/email-settings
you have this sentence: IMAP mailboxes can be provided for an annual fee viewable HERE.
The link goes to general support page, not the page specified in the link.
(https://www.tpg.com.au/products_services/imap.php)
The link is one of the old pages no longer accessible.
Thank you for pointing this out @david64.
We'll raise this with our team as we do not sell any Email account anymore.
BasilDV