Disabling Email Application

Click on Email icon in Dashboard then click on Disable.  Once accepted:
* Google will no longer accept mail from your domain. Incoming
messages will be bounced back to the sender.
* Users will not be able to sign in to check their mail or view
saved mail.
* User's existing email archives will still be stored by Google.
* If Email is added back as a service, users will be able to sign
in to view saved mail.
* This may take up to 30 minutes to take effect

Although it says 30 minutes, it might take well over a day