I've noticed that typo and sent email to the right user straight after that. Same result.
Code:
Content-Description: Delivery report
Content-Type: message/delivery-status
Reporting-MTA: dns; serwer2slt.lan
X-Postfix-Queue-ID: 9C64F29691A
X-Postfix-Sender: rfc822; webm2slt@serwer2slt.lan
Arrival-Date: Thu, 30 Jul 2009 13:14:51 +0200 (CEST)
Final-Recipient: rfc822; admin@serwer2slt.lan
Original-Recipient: rfc822;admin@serwer2slt.lan
Action: failed
Status: 5.1.1
Diagnostic-Code: X-Postfix; unknown user: "admin"
What do you think aboaut the last line?