Can the MageMail javascript be hosted locally?

Yes, by default the javascript will be pulled from

https://magemail.co/app/skin/js/magento.js

But you can also host that javascript at your own website in order to speed up frontend loading - this will leverage any CDN that you have in place and also prevent an additional domain lookup.

In order to enable this, just set *Host Javascript Locally* to *Yes* under *Promotions* > *MageMail* > *MageMail Advanced Settings*.

The javascript will be downloaded from magemail.co and stored locally every time the config cache is cleared to:

http://yourstore.com/js/magemail-magento.js