Help decipher NDR

[myshadow]

An NDR came back with the info below, please help me decipher it. Where did it get rejected?

> From: postmaster@site1.com.au [SMTPostmaster@site1.com.au]
> Sent: Thursday, 28 November 2002 1:14
> To: sender@site2.com.au
> Subject: Delivery failure (recipient@cm1.site3.net.tw)
>
> Your message has encountered delivery problems
> to the following recipient(s):
>
> recipient@cm1.site3.net.tw
> Delivery failed
> 550 5.7.1 Access denied


In the Attxxx.txt file:

Reporting-MTA: dns; SMTPSWEEP.aplace.site1.com.au
Received-From-MTA: dns; mail01.site2.com.au (go.read.the.RFC.this.server.doesnt.resolve.rfc1918
[172.anIP.address.60])
Arrival-Date: Thu, 28 Nov 2002 12:13:14 +1100

Final-Recipient: rfc822; recipient@cm1.site3.net.tw
Action: failed
Status: 5.7.1 (Permanent failure - security: delivery not authorised, message refused)
Remote-MTA: dns; cm1.site3.net.tw
Diagnostic-Code: smtp; 550 5.7.1 Access denied

 

[lengoo]

Looks like they have blocked access somehow