The other item of interest here is VIP Alerts. Tap this button, and you're taken to Settings -> Notifications -> Mail -> VIP, where you can configure iOS-notification settings for email received from VIPs.

In iOS 5, your notifications options for Mail (found in Settings -> Notifications -> Mail) were much like those for any other app: You got one set of notification settings that covered all incoming email. In iOS 6, you now get per-account notification settings, as well as separate options for VIP messages.

Go to the Mail screen of Notifications settings and you see three sets of options. The Show item simply lets you choose how many unread email messages appear in Notification Center. The other two groups are where you fine-tune your notifications.

Choose any email account from the list, or the VIP item, and you get--for each account or for VIPs--the standard Notification Center options: alert style, app-icon badge, whether or not to show a preview of the message, or whether or not to view notifications on your device's lock screen. In other words, you can choose to enable all options for your work account, but only some for your personal account.