XFOR: DAT Extension On Inbound Internet Mail Attachments
ID: Q181955
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The information in this article applies to:
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Microsoft Exchange Server, version 5.0
SYMPTOMS
When a user receives a message through the Internet Mail Service, the
inbound attachments included with the message appear with a .dat file
extension. This can occur even if the Name= appears with the correct file
extension in the RFC 822 header. The name of the attachment is correct, but
the extension is incorrect.
CAUSE
This problem occurs when the "application/octet-stream" MIME type is
located in the MIME database. This can occur if you install Exchange
Server 5.0 RC2 over Exchange Server 5.0 RC1, and then install Exchange
Server 5.0 RTM.
WORKAROUND
To work around this problem, perform the following steps:
- Click Start, point to Programs, point to Microsoft Exchange, and then
click Microsoft Exchange Administrator.
- In the left pane, click the Protocols object under the appropriate
Exchange Server computer, and then click Properties on the File menu.
- If the Use Site Defaults For All Properties check box on the General
tab is not selected, proceed to step 3.
- If the Use Site Defaults For All Properties check box is selected,
follow these steps, and then proceed to step 3:
- Click Cancel to close the Protocols property page.
- In the left pane of the Administrator window, click the Protocols
object under the appropriate site, and then click Properties on the
File menu. Note that the Protocols object appears under the
Configuration object.
- Click the MIME Types tab, click "application/octet-stream" in the list
of MIME content types, click Remove, click Yes, and then click OK.
- Stop and restart the Internet Mail Service. To do so, follow these
steps:
- In Control Panel, double-click Services.
- Click the Microsoft Exchange Internet Mail Service, click Stop, and
then click Yes.
- Click the Microsoft Exchange Internet Mail Service, and then
click Start.
MORE INFORMATION
For more information, please see the following Microsoft Knowledge Base
article:
Q146263
XFOR: IMC Packages Failed Messages in ATT, DAT, or TXT
Additional query words:
MIME IMS Attachment
Keywords : XFOR
Version :
Platform :
Issue type : kbprb
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