XFOR: IMC Accepts SMTP Address with Space While IMS Does Not (191262)


The information in this article applies to:

  • Microsoft Exchange Server 4.0
  • Microsoft Exchange Server 5.0
  • Microsoft Exchange Server 5.5
This article was previously published under Q191262

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
Modification Type:MinorLast Reviewed:4/28/2005
Keywords:kbprb KB191262
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