Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the Postfix program at host crankshaft.bitmechanic.com.

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

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the message returned below.

                        The Postfix program

<ed@ultimanet.com>: host inbound.ultimanet.com.criticalpath.net[209.228.4.171]
    said: 550 User unknown (in reply to RCPT TO command)

Reporting-MTA: dns; crankshaft.bitmechanic.com
Arrival-Date: Tue,  1 Jul 2003 22:43:59 -0700 (PDT)

Final-Recipient: rfc822; ed@ultimanet.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host
    inbound.ultimanet.com.criticalpath.net[209.228.4.171] said: 550 User
    unknown (in reply to RCPT TO command)

--- Begin Message --- Subject: Re: Application Date: Tue, 1 Jul 2003 22:52:14 --0700

Please see the attached zip file for details.

"your_details.zip
Description: Zip compressed data

--- End Message ---