failure notice from BSDMall.com

[James Bergsten]

Sorry to bother but...

... attempted to email (regarding unfulfilled order) to 
sales at bsdmall.com (this email address from the bsdmall.com "contact" 
link).  Got the following reply:
    ----- The following addresses had permanent fatal errors -----
witt at cylogistics.com
     (reason: 550 5.1.1 User unknown)
     (expanded from: <sales at bsdmall.com>)
    ----- Transcript of session follows -----
550 5.1.1 witt at cylogistics.com... User unknown
Reporting-MTA: dns; mail2542.carrierzone.com
Received-From-MTA: DNS; shell4.bayarea.net
Arrival-Date: Mon, 9 Apr 2007 22:27:24 GMT
Final-Recipient: RFC822; sales at bsdmall.com
X-Actual-Recipient: RFC822; witt.cylogistics.com at mail2542.carrierzone.com
Action: failed
Status: 5.1.1
Diagnostic-Code: X-Unix; 550 5.1.1 User unknown
Last-Attempt-Date: Mon, 9 Apr 2007 22:27:25 GMT
Any assistance or forward pointer would be appreciated.

Thanks
Jim B.