I faced similar sitch with the address. For a long while, I had to send stuff to Ms. Wonka's sister's house before Ms. Wonka was comfortable enough to give me her new address after she moved out. It is the Berlin Wall thing...don't take it personally.
Emails are safe for WAS because they can control how and when to read/send emails. It is the idea of giving away their new address which makes them vulnerable and exposed as if we just might barge in their new front door!
