It's just an email. If you don't respond, what's the worst thing? Did she ask you a question? Or did she just ask you to do something? Does that email warrant a response?
Sounds to me like she didn't ask you a question. She asked you to do something - i.e. leave all accumulated mail in the mailbox.
Stay dark.
----"Et tu, Brute?"---- me:28 W:24 S4 T:6 M:4 EA Exposed: 5/21/10 Bomb: 6/20/10 (Father's Day) NC w/ OM: 7/10/10 W moved out 8/21/10 http://bit.ly/aOrZne - My sitch
