I have a Samsung D500 and have set everything up according to the o2 website for sending e-mails. It's all their settings, I have changed nothing apart from putting in my own o2 username and password. Whenever I try to send an e-mail it just says "e-mail network failure". What could be wrong? I have went over the settings time and time again and they are all correct as far as I can see. Please someone help!