Q251149

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page	Q251149: XIMS: Guest Account Allows Relaying with Routing Restrictions	/kb/251/Q251149/

Q251149: XIMS: Guest Account Allows Relaying with Routing Restrictions

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Article: Q251149
Product(s): Microsoft Exchange
Version(s): winnt:5.5
Operating System(s): 
Keyword(s): exc55
Last Modified: 11-MAR-2000

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The information in this article applies to:

- Microsoft Exchange Server, version 5.5 
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SYMPTOMS
========

The Internet Mail Service may allow non-authenticated users to relay mail if the
Microsoft Windows NT domain Guest account is enabled.

CAUSE
=====

This problem can occur if non-authenticated users bypass routing restrictions
that require authentication by using the Guest account. After Simple Mail
Transfer Protocol (SMTP) authentication does not work, some clients use the
Guest account.

WORKAROUND
==========

To work around this problem, disable the Guest account:

1. In Windows NT User Manager for Domains, double-click the Guest account to
  select it.

2. Click to select the "Account Disabled" check box, and then click OK to save
  the changes.

Additional query words: IMS IMC relay netscape

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Keywords          : exc55 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbprb

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