Auto-Disconnect

[Guest nsm]

Even though I am on the t-mobile wnw package - I find that keeping my 3g/Gprs connection on the whole time drains the battery faster than without it on - quite an obvious statement. Anyways as my main use is for POP email - which I have setup my accounts thru 'messages' - what I have is the individual accounts connecting and checking for email every 30 mins or so.

But what I am looking for is an auto-disconnect, i.e after it has checked the email (taking approx 1 - 2 mins max) I want it to disconnect the 3g/gprs connection until the next 30 minute mark.

Is there something that will do this - and don't tell me there is something built into messaging - as i have had a good look and will be ashamed to find that I missed it.

Thanks