Nokia :: How To Select Access Point For Email - X6

I've recently purchased an X6, it's a great phone. The only problem I'm having is sorting out the connection settings for my emails (under the Messaging menu). I don't seem to be able to select an access point. My default connection is my home WLAN In my Internet access point the priorities are:

1. Home WLAN
2. 3G
3. GPRS

This works perfectly for all other apps and the internet; but under Options > Settings > Email > Mailboxes > *select mailbox* > Connection settings > Incoming e-mail > Access Point in use. I can only select specific connections, there doesn't appear to be any option to select my Internet access point? It's currently set to "Default Connection" which means it uses my WLAN nicely. But when I leave the house it doesn't work without manually navigating through all those options above which is pretty inconvenient. Am I missing something, or do I really need to do that each time I leave the house and return?