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NDR: #5.7.1 smtp;554 5.7.1 <clientemailaddress>: Relay access denied>

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NDR: #5.7.1 smtp;554 5.7.1 <clientemailaddress>: ... - 4.Dec.2008 5:12:43 PM

RAS

Posts: 2
Joined: 4.Dec.2008
Status: offline

All,

a user trying to send an automated email to my network received the following NDR:
You do not have permission to send to this recipient.
For assistance, contact your system administrator.
<exchange_server_name> #5.7.1 smtp;554 5.7.1 <clientemailaddress>: Relay access denied>

If they send an email using outlook then the message went through just fine. But when they are sending an automated email from their web portal to my domain then they received the above NDR.

The question is the NDR message is generated by my Exchange server or their exchange?
any idea how to resolve it?

Thanks a bunch.

Post #: 1

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RE: NDR: #5.7.1 smtp;554 5.7.1 <clientemailaddress&g... - 4.Dec.2008 11:08:05 PM

uemurad

Posts: 8232
Joined: 7.Jan.2004
From: California, USA
Status: offline

First, understand what relaying means. It's an attempt to send a message to an SMTP server not acting as the authority for the recipient address.

In other words, if your server attempted to send a message to my server addressed to yahoo.com, that's relaying. My server will deny the relay attempt.

The question is, to where is the web portal sending the message? It sounds like it's not your Exchange server. Either that or the message is addressed to something not in your SMTP domain (e.g. yahoo.com).

_____________________________

Regards,

Dean T. Uemura
Microsoft MVP - Exchange (2007-2011)
exchangeguy.blogspot.com
uemurad@yahoo.com

(in reply to RAS)

Post #: 2

RE: NDR: #5.7.1 smtp;554 5.7.1 <clientemailaddress&g... - 5.Dec.2008 5:13:24 AM

NileshS

Posts: 173
Joined: 27.Apr.2008
Status: offline

quote:

The question is the NDR message is generated by my Exchange server or their exchange?
any idea how to resolve it?

To answer your question as to which server generated the NDR; look at the NDR message they received:

<exchange_server_name> #5.7.1 smtp;554 5.7.1 <clientemailaddress>: Relay access denied>

In the above case, "exchange_server_name" would have been the server generating the NDR which should be the source server from where this email was sent since it never reached your Exchange box.

To fix this issue, they need to allow the relaying for their Web server through the Exchange box. By default for security purposes, relaying is not allowed from the Exchange box as it can lead to authenticated spamming issues.

For more information on how to enable relaying for specific devices or applications, read through the following and let me know in case you do not understand anything:

Controlling SMTP Relaying with Microsoft Exchange
http://www.microsoft.com/technet/security/prodtech/exchangeserver/excrelay.mspx

How to troubleshoot mail relay issues in Exchange Server 2003 and in Exchange 2000 Server
http://support.microsoft.com/kb/895853

Hope it helps!

(in reply to RAS)

Post #: 3