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Q191262: XFOR: IMC Accepts SMTP Address with Space While IMS Does Not

Article: Q191262
Product(s): Microsoft Exchange
Version(s): winnt:4.0,5.0,5.5
Operating System(s): 
Keyword(s): 
Last Modified: 06-APR-2000

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The information in this article applies to:

- Microsoft Exchange Server, versions 4.0, 5.0, 5.5 
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SUMMARY
=======

Administrators of Microsoft Exchange managing multiple versions of the Internet
Mail Connector may notice that in older versions, address nomenclature not
normally seen in Internet Mail messages are accepted inbound, but not accepted
inbound with later versions. The 553 malformed address: return code will be
seen.

CAUSE
=====

As the Microsoft Exchange product matures, the Internet Mail Connector by design
is more strict with respect to address formatting.

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

The Internet Mail Connector can be slackened with respect to allowing uncommon
addresses inbound. The following registry entry can be employed.

1. Start Registry Editor (Regedt32.exe or Regedit.exe, depending on your version
  of Windows NT).

2. Under the HKEY_LOCAL_MACHINE subtree, go to the following subkey:

  System/CurrentControlSet/Services/MSExchangeIMC/Parameters

3. On the Edit menu, click Add Value, and then use the following entry:

  Value Name: AcceptMalformed821Adrs
  Data Type: REG_DWORD
  Value: 1

4. Cycle the Internet Mail Connector when done

Additional query words:

======================================================================
Keywords          :  
Technology        : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2
Version           : winnt:4.0,5.0,5.5
Issue type        : kbprb

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