Question : Undeliverable Message - Error 5.1.0 - Unknown address error 554-'No relaying allowed - psmtp'

Hi Experts,

I am getting this error (using Eudora on Windows 7):

From: "Mail Delivery System" <MAILER-DAEMON@ironport1-mx.cbr1.mail-filtering.com.au>
Subject: Undeliverable Message

The following message to <firstname.secondname@strabag.de> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 554-'No relaying allowed - psmtp'


Reporting-MTA: dns; ironport1-mx.cbr1.mail-filtering.com.au

Final-Recipient: rfc822;firstname.secondname@strabag.de
Action: failed
Status: 5.0.0 (permanent failure)
Remote-MTA: dns; [207.126.147.10]
Diagnostic-Code: smtp; 5.1.0 - Unknown address error 554-'No relaying allowed - psmtp' (delivery attempts: 0)

X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AqkIABs0OkzLWHsE/2dsb2JhbACTcoxBBG27MYUnBIhM
X-IronPort-AV: E=Sophos;i="4.55,185,1278252000";
   d="pdf'?scan'208,217";a="204540693"
Received: from node1.alpha.aussiehq.net.au ([203.88.123.4])
  by ironport1-mta.cbr1.mail-filtering.com.au with ESMTP; 12 Jul 2010 14:18:30 +1000
Received: (qmail 15972 invoked from network); 12 Jul 2010 14:18:29 +1000
Received: from 202.164.202.89.static.rev.aanet.com.au (HELO potoroo7.mincad.com.au) (202.164.202.89)
  by node1.alpha.aussiehq.net.au with SMTP; 12 Jul 2010 14:18:20 +1000
Reply-To: "Leigh Wardle" <[email protected]>
Message-Id: <7.0.1.0.2.20100712141757.056568c8@mincad.com.au>
Message-Id: <7.0.1.0.2.20100712132902.05656780@mincad.com.au>
Disposition-Notification-To: <[email protected]>
X-Mailer: QUALCOMM Windows Eudora Version 7.0.1.0
Date: Mon, 12 Jul 2010 14:18:00 +1000
To: firstname.secondname@strabag.de
From: Leigh Wardle <[email protected]>
Subject: HIPAVE licence renewal

Regards,
Leigh

Answer : Undeliverable Message - Error 5.1.0 - Unknown address error 554-'No relaying allowed - psmtp'

Well it seems that strabag.de are using Postini for the email filtering and anti-spam and anti-virus filtering.

The error code above has " - psmtp" in it which suggest that the message has been blocked by the Postini.

The above error code could be generated when Postini Connection Manager blocks a IP address or if the sender domain or the sender's email address has been put to Blocked Senders list on Postini.

I would suggest to check with the IT helpdesk of the recipient and let them know about this error since they would be able to fix it. Or else you could also the recipient user to put your domain in the approved senders list. Since in Postini every user could manage their own approve senders list  and blocked senders list. Below is the Postini knowledgebase for the error codes:

http://www.google.com/support/appsecurity/bin/answer.py?hl=en&answer=134416

I hope that wold help

Sudeep