XCON: NDRs Dropped on Message to Recipient w/ Multiple DDAs (176181)

The information in this article applies to:

Microsoft Exchange Server 5.0

This article was previously published under Q176181

SYMPTOMS

When you submit a message to a recipient address that contains multiple DDA pairs, any non-delivery report (NDR) that may occur for the message will be discarded by the Store. An example of an address which meets this criteria is as follows:

   C=<country code>;A=<admd>;P=<prmd>;O=<organization>;
   DDA:RFC822=User@domain.com;DDA:MSXCX500=C=<country code>;A=<admd>;
   P=<prmd>;O=<organization>;OU=<organizational unit>;CN=User

CAUSE

As in the above example, the DDA pairs are defined in the following order:

   DDA1 type, DDA1 value, DDA2 type, DDA2 value

However, when parsing the address, the order was assumed as DDA1 type, DDA2 type, DDA1 value, DDA2 value. As such, a failure occurs upon parsing of the address when more than 1 DDA is present.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.0. This problem has been corrected in the latest U.S. Service Pack for Microsoft Exchange Server version 5.0. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Modification Type:	Minor	Last Reviewed:	9/23/2005
Keywords:	kbHotfixServer kbQFE kbbug kbfix KB176181