Turn radio on/off - Stop/start receiving e-mails

[abx]

Hi all,

I got a little Question.

Is it possibile to turn the radio on/off with a java application? I would need this to stop receiving e-mails and turn the radio on again when an application is ready to receive the mails.
If it is not possible to turn off the radio, is there any other way to stop/start pushing the mails to the device?

Thx.
abx