We now support sending notifications to your cell phone, Chrome Web, and other devices via Pushover! If you've never heard of Pushover, check out their website here.
To manage your notifications, first register on Pushover. Once you have a Pushover user key, head on over to your user profile page here on MG and enter the key in your External Accounts. Once done, any alerts you have configured here on MG will automatically be sent to the devices you want.