Secondary Email

How can I set Notify to use a different email address than the one on the user?

There is no direct provision for this in Notify.

You can do this by adding a custom module to allow people to add a secondary email address to their profile, and use hook_mail_alter() to change the destination of notifications.

Please note that such a hook may open up Notify to be abused to send unsolicited notifications to that address. This means that it there should be some extra email authentication framework in place for this to be secure, but fixing that would be up to whoever implements this custom module.

OP hasn't commented in a week. Closing.