Is flag@whitehouse.gov gone?

Is flag@whitehouse.gov gone? A colleague just sent an email and received this message:

This is an automatically generated Delivery Status Notification

Delivery to the following recipient failed permanently:

FLAG@WHITEHOUSE.GOV

Technical details of permanent failure:

Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 5.2.1 ... The email address you just sent a message to is no longer in service.We are now accepting your feedback about health insurance reform via:http://www.whitehouse.gov/realitycheck (state 14).

The WH first introduced flag@whitehouse.gov on August 4th. In their blog, "Facts Are Stubborn Things" posted that Tuesday, the White House called on people to send emails to that address whenever they got"an email or see something on the web about health insurance reform that seems fishy."