Not ecommerce as such, but can't find where else to post this. I need to be notified immediately when emails from one particular sender comes in to my MacMail on my iphone. So this means, even when I'm not "in Mail" and it's not my active app, when my phone's in sleep, when I'm in another app, etc. I just want a notification to ping up just as text messages or voicemails do. But no matter what I've tried, it doesn't happen. Any ideas anyone?