Why am I unable to connect to the internet to get my emails?

BB curve 9320.
I have not received emails for a few days. About a month ago I changed to SIM only with Vodafone, I was already with Vodafone.
When I go to email accounts in Set Up I get the message : "connecting to email settings", followed later by "unable to connect to server" -retry?

I have tried battery removal, sim card removal and reboot, all to no avail - help please.

Make sure Vodafone has your data plan as a BIS (BlackBerry Internet Service) data plan. Generic smartphone data plans won't work on legacy BBOS devices.
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