How to enable email for notifications?
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I'm developing a prototype on Facebook and want to ensure that if they want, users can get an email along with the regular Facebook notification.  This has been specifically requested from some of my users who don't spend a lot of their time on the site, and have their notification settings really tight, but do check their email regularly.

I've enabled all the settings I can find,
![app settings](http://i.imgur.com/HHGSU.png)

![notif settings](http://i.imgur.com/aoard.png)

![email settings](http://i.imgur.com/UHy8G.png)

But still nothing.

Even though Facebook seems to give you the option, is there no way to do this, because I see that most other apps who email me directly generally do it from their own domain / email account, rather than through the Facebook messaging system.

Any ideas?  Thanks.