CAUSE
In the X.400 P1 header information fields, there is information about the
recipients and originator of an e-mail message. These fields contain the
X.400 addresses, and may contain the directory names of the recipients and
originator. According to the X.400 Blue Book specification, a directory
name is a valid optional field.
When a message arrives at the gateway's MTS-OUT folder and the originator
or reciepient address is a directory name in the form of
"EX:/O=Org/OU=Site...," the gateway developer should use the
IABContainer::ResolveNames and IAdrBook::PrepareRecips methods to resolve
the directory name to an address that is meaningful to the gateway. To
perform this, the gateway must have access to an address book.
This may not be possible in certain cases. For example, it is not possible
when sending over the following route:
Exchange Server 1 -> 1988 X.400 link -> Exchange Server 2 -> Gateway
The gateway has an address space for X.400 defined. If there is no
replication between the two Microsoft Exchange Server sites and
organizations, there is no way for the gateway to query an address book. It
may not be possible to resolve the recipient or originator address to a
meaningful e-mail address, and message delivery will fail.
STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server
versions 4.0 and 5.0.
This problem was corrected in the latest Microsoft Exchange Server 4.0 and 5.0
U.S. Service Packs. For information on obtaining the service pack, query on the
following word in the Microsoft Knowledge Base (without the spaces):