I had a chat with my ISP today. Apparently they filter emails on my behalf based on whatever criteria they deem fit, and the only way to override this is for me to add email addresses to my allow list.
This really gets to me as i feel that no one but me has the right to decide what email i receive. I think in future i must use my gmail address instead of my ISP one.
So to Bingohall i appologise for implying it was your fault. I guess as affiliates we owe it to our visitors to educate them in scenarios such as the one i have just exerienced.