Problem with Apple iPad. Lost phone line and Internet connection due to rainwater in external cable. BT called and repaired. Everything back to normal, except the iPad had lost Internet connection. Talktalk technician called and checked wiring on router, etc. Installed a filter. Everything back to normal BUT ONLY FEW HOURS, after which iPad again lost Internet connection. Cannot get mail. The mail server "mail.talktalk.net" is not responding. This is the constant message on screen both and Mail. Yet Talktalk report that everything is okay! Any suggestions? I repeat - router shows that there is internet connection.