errors in exchange 2003

Dear Sir,

i have in my company one Domain ( windows server 2003 ) and have one Exchange 2003 installed in  this domain ,

so i found a lot of errors in applecation event viewer from excahnge . the errors is

Event Type: Error
Event Source: MSExchangeTransport
Event Category: NDR
Event ID: 3030
Date:  9/13/2012
Time:  2:22:18 PM
User:  N/A
Computer: SERVER
Description:
A non-delivery report with a status code of 4.0.0 was generated for recipient rfc822;alikatrn@hitmail.com (Message-ID <SERVERCVYl4maEqxGGm000005f0@server.gas.gas.com>).

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: d1 02 04 c0               Ñ..À   

this errors apper every mints !!!!

i will send image for this errors

what can i do to cansel this errors or fix it ?????

please replay harry

Thanks a lot

eng. Ramy Fotouh

thebmw