how can one override default registration email in a hook form alter registration?

Question

The main site sends a registration email and I do not want that email to be sent to this new registration as it should have its own custom email. I am having a hard time with this because every time a user registers either on main registration or this custom registration, they get the same mail. How can i keep my custom registration mail separate?

Answer 1

Simple way: http://drupal.org/project/advanced_mail_reroute