I have a personal email address that I host on my personal account. I have set it up on my iphone and the account synchronizes fine when I am connected to a wifi point. As soon as I rely on the o2 data connection it says it cannot connect to the mail server and I cannot visit to the website. If i replace the mail server e.g. mail.domain.com with the ip address it will work fine without problem.

This must mean that o2's domain name server aren't recognizing my domain, is there a way to manually change them. I know how to do it for wireless connections but not for edge.

Any advice will be appreciated.