Undelivered mail: User unknown

Wed Apr 11 10:53:42 EDT 2007

This is an automatically generated Delivery Status Notification.

The original message was received at Wed, 11 Apr 2007 10:45:48 -0400
from 

I'm sorry to inform you that the message you have sent
could not be delivered to one or more destinations.

----- The following addresses had permanent delivery errors -----
<sjmsmith44 at comcast.net>: (unrecoverable error)

----- Transcript of session follows -----
mail.local: unknown name: sjmsmith44
550 <sjmsmith44 at comcast.net>: User unknown in virtual mailbox table