Hi @hatho, the reason why you're experiencing this is due to an unplanned email outage and this is posted on our Service Status Page.
To view more updates, you may visit this link:
We apologise for the inconvenience.
These outages are becoming more frequent and for longer periods-- this one currently forecast to be 2 days and 30 minutes-- but the resumption time has been drifting out for most of the two days.
This performance is most unsatisfactory and a sure way to loose your email customers-- you need to do much better.
You can also check this link: https://community.tpg.com.au/t5/Broadband-Internet/TPG-Email-Outage/m-p/36786
We sincerely apologise for the inconvenience.