KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q256856: XIMS: "550 Relaying Is Prohibited" Error Returned for Messages

Article: Q256856
Product(s): Microsoft Exchange
Version(s): winnt:5.5 SP3
Operating System(s): 
Keyword(s): kbenv kberrmsg
Last Modified: 16-APR-2000

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Exchange Server, version 5.5 SP3 
-------------------------------------------------------------------------------

SYMPTOMS
========

When you enable the "Do Not Reroute Incoming SMTP mail" option on the Routing
tab in Internet Mail Service (IMS) and your previously configured routing
restrictions are still in place, a "550 Relaying is prohibited" error message
may be displayed for all incoming e-mail messages. This behavior occurs even
though the message recipient is found in the Exchange Server global address
list.

CAUSE
=====

This behavior occurs when you enable the "Do Not Reroute Incoming SMTP mail"
option. This option is an old setting from Microsoft Exchange Server 4.0. When
this feature is active, e-mail messages are not routed because e-mail messages
are not delivered.

WORKAROUND
==========

If you want to restrict Internet Mail Service from being used as a relay and
make sure the "550 relay prohibited" error message is displayed, use the
following steps:

1. Enable the Reroute Incoming SMTP Mail option.

2. Click Routing Restrictions.

3. Click to select the "Hosts and clients with these IP addresses" check box,
  and then click OK.

4. Stop and restart Internet Mail Service.

MORE INFORMATION
================

For additional information about routing restrictions, click the article numbers
below to view the articles in the Microsoft Knowledge Base:

  Q196626

  Q193922

Additional query words: ims gal

======================================================================
Keywords          : kbenv kberrmsg 
Technology        : kbExchangeSearch kbZNotKeyword2 kbExchange550SP3
Version           : winnt:5.5 SP3
Issue type        : kbprb

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.