Ok, I'll make it simple, step by step:
1. I enter the stock email app, select settings in the menu bar, select notification settings, uncheck "vibration", exit the email app. Next I hit the volume rocker and select "vibration". The phone won't vibrate with incoming emails. Then I hit the volume rocker and select "sound". The phone will play the notification sound.
2. I enter the stock email app, select settings in the menu bar, select notification settings, CHECK "vibration", exit the email app. Next I hit the volume rocker and select "vibration". This way the phone WILL vibrate with incoming emails. Then I hit the volume rocker and select "sound". The phone will play the notification sound AND vibrate.
All good. Now what I want is the phone to play JUST notification sounds and NOT vibrate when I select "sound" with the rocker. And I want the phone to JUST vibrate notifications when I select "vibrate" with the rocker. But apparently this isn't possibile with the stock email app: it always vibrates (if you check "vibration" in-app, whatever "sound" or "vibration" you select with the rocker) or never (if you uncheck "vibration" in-app, whatever "sound" or "vibration" you select with the rocker). All this doesn't happen with the text messaging app. I.e. I uncheck the "vibration" in-app, still when I select "vibration" with the rocker the phone vibrates when I get an sms. Completely different, and correct, behaviour from the email app.
I hope I made myself clear. Any suggestions? Thanks very much.