Yes I think you are right. I have tangled with BT for almost 30 years now so nothing surprises me. It has got better over the years. At least now you get answered fairly quickly most of the time. Unfortunately they still always want to sell you a new contract.
I have found a similar problem in the last couple of days. Short simple emails to one addressee get sent but longer ones particularly replies following a thread fail and a box appears saying suspected phising error (6-1-1-1) ID (68C798FD00060 CE4). No idea why this hould suddenly happen overnight. I have not changed anything on btmail for years and it has always worked before.
Hi there @JohnnyRoss
Thanks for coming to the community.
Are you accessing the email account using a third party client or web browser?
Do you have a VPN activated?
Could you also try and change the subject field as some phrases can be picked up by the spam filters.
Speak soon.
Thanks.
Leanne.
Turn off VPN
Will Try it, but fail to understand how this could be the culprit.