A black hole e-mail address is an e-mail address which is valid (messages sent to it will not generate errors), but to which all messages sent are automatically deleted, and never stored or seen by humans.
AngularJS website indexed by SEO engine (faceboook bot, twitter bot, etc)
AngularJS projects by default using the hashbang syntax for urls to handle navigation without forcing the client to reload the whole application on every state change.
this make some problem if we want using SEO, the url will not expose to crawler by bot and for some solution we must change configuration to get pretty urls.
This Technical document contains how to make SEO Engine can indexed AngularJS.