You don’t have to use the same salt for each email, right? You can hash each email with a separate, random salt and “brute force” upon password recovery. That way while individual emails can still be restored, you can’t easily get a database of emails to mass-spam, which is the point (emails are not really private completely, anyway).
I also like apple’s method, but it is not either-or.
I like Apple's approach to generating random throwaway emails.