So I've been in contact with IOI's customer support about me not being able to receive system emails (eg password reset emails) from them.
The conclusion they came to is that BT is blocking their emails that are sent through Amazon Web Services, I was only able to communicate with their support team because those mails are sent through Microsoft.
So maybe some automatic filters at BT have marked the @ioi.dk domain through AWS as spam and are blocking them? I believe the change occured in around March of last year, as that's when I stopped receiving marketing emails from them.
I have also personally added the @ioi.dk domain to my trusted senders list and it has done nothing.
So could someone at BT please investigate this issue and stop blocking these emails for me?
Thanks in advance.
Have you checked that the email address or its domain is not in your blocked senders list?
Yes. I don't have any blocked senders and I have the @ioi.dk domain in my safe senders. I contacted BT support and they've said it should be resolved within 48 hours.
Yep, still haven't received any human communication from the team working on it.