Disabling notification for new email

[Guest julians]

Does anyone know how to disable the notification for new emails on windows mobile 6.0 ppc pro.

I mean the one that pops up on the 'home/today' screen when a new email arrives and turns the left soft button into a notification button.

I've gone into sounds & notifications in settings and unchecked "display message on screen" for new emails, but it still displays the message on screen. I've restarted the device, but it still displays the notification.

Is this a bug? or is there another way I should be doing it.

This is on a samsung i780 if it makes any difference.