XCON: MTA Loses Attachment on FTBP Messages with No Subject

ID: Q232370

The information in this article applies to:

Microsoft Exchange Server, version 5.5

SYMPTOMS

If the Exchange Server Message Transfer Agent (MTA) receives a native X.400 message from a foreign MTA that was sent with a File Transfer Body Part (FTBP) and the originator did not add a subject to the message, depending upon whose foreign MTA sent the message, when the message is viewed by a client, the original attachment is lost, and a zero length attachment called Att.dat is present. If the originator did add a subject, the attachment will be viewed correctly.

CAUSE

The MTA did not correctly handle the different ASN.1 encoding used by the foreign MTA.

RESOLUTION

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, please see the following article in the Microsoft Knowledge Base:

Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or later:

Component: MTA

File name	Version
Emsmta.exe	5.5.2600.0
Ems_rid.dll	5.5.2600.0
Mtamsg.dll	5.5.2600.0
Infoblog.cfg	N/A
Infodlog.cfg	N/A
Infollog.cfg	N/A
Infoplog.cfg	N/A
Infotlog.cfg	N/A
Info4log.cfg	N/A
Dcprods.cat	N/A
X400om.dll	5.5.2600.0
X400omv1.dll	5.5.2600.0
Mtacheck.exe	5.5.2600.0
Dbserver.sch	N/A
P2.xv2	N/A

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.

Additional query words:

Keywords : exc55 EXC55SP3Fix
Version : winnt:5.5
Platform : winnt
Issue type : kbbug