IPhone not updating mail

Just a thought as you haven't had any mail since July more likely to be a glitch than a Jersey problem
I have an Android but have experience this before I deleted my email account then reinstalled it problem solved

Yes, it has happened to me after logging on to the Internet on the cross Channel ferry. I think you have to log into your account using your original password. Try looking in settings to see if there’s a way of doing that.

Probably daft question my phone was playing up last time we were in Jersey are you connected to your accommodations internet or running on 4g

Google how to do it on your netbook