email

what is the meaning of the following error,
this error messge is recieved after i send my mail through microsoft outlook.my os is winxp with service pack2 Reporting-MTA: dns; localhost.localdomain

error message :

Arrival-Date: Thu, 28 Oct 2004 16:19:27 +0530

Final-Recipient: RFC822; arunbaretto@srei.com.SMTP
Action: failed
Status: 5.1.2
Remote-MTA: DNS; srei.com.smtp
Diagnostic-Code: SMTP; 550 Host unknown
Last-Attempt-Date: Thu, 28 Oct 2004 16:20:03 +0530