Not receiving POP3 mail when Norton Wifi Privacy (i.e. VPN) on

I have been having problems getting mail from BTINTERNET since I started using Norton WiFi Privacy's VPN- I did not notice at first because BT Internet use Yahoo which is notoriously unreliable so I blamed it on that until I noticed that it was working on a PC does not use the VPN.

Are there any settings I can change so I do not have to turn the VPN off.