Automatic URL / Email URL Reduction with Bitly via AddThis API

Question

I cannot shorten the URL displayed in the AddThis email popup when using the built-in .ly bit reduction service in AddThis.

It works with Twitter, but not with Facebook and email. Is it supported?

var addthis_share = { url: "http://www.wrestlemaniamainevent.com/wishlist/kjhksad897dsjkhdsa98273", title: "View My List", url_transforms: { shorten: { twitter: 'bitly', facebook: 'bitly', // Unsupported? email: 'bitly' // Unsupported? } }, shorteners: { bitly: { login: '{login}', apiKey: '{key}' } } }