XCON: Inserted Bitmap Image Appears as Attached .Att File

• Microsoft Exchange Server, version 5.5

SYMPTOMS

When you insert a bitmap image into a message, and then send the message to a Microsoft Exchange Server computer, the image may appear as an attached file with a .att extension when it is received by an e-mail client.

CAUSE

This problem occurs when the Multipurpose Internet Mail Extensions (MIME) database does not contain an entry for the "image/bmp" content type. This entry is not added to the database by default.

WORKAROUND

To work around this problem, add an entry for the "image/bmp" content type manually. To do so, follow these steps:

1. Click Start, point to Programs, point to Microsoft Exchange, and then click Microsoft Exchange Administrator.



2. 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:
   
   
   
   1. Click Cancel to close the Protocols property page.
   
   
   
   2. 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.
   
   
   



3. Click the MIME Types tab, and then click New.



4. In the MIME Content Type box, type "image/bmp" (without quotation marks).



5. In the Associated Extension box, type "bmp" (without quotation marks).



6. Click OK, and then click OK again.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5. We are researching this problem and will post additional information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

For additional information about receiving unexpected or incorrect attachments in messages, please see the following articles in the Microsoft Knowledge Base:

Q146263 XFOR: IMC Packages Failed Messages in ATT, DAT, or TXT

Q153464 XFOR: Unexpected Text Attachment in Mail Received from Internet

Q161044 Internet Mail Message Delivered as Attached Text File

Q181955 DAT Extension Appears on Inbound Internet Mail Attachments

Keywords          : XCON kbbug5.50 
Version           : WINDOWS:5.5
Platform          : WINDOWS 
Issue type        : kbbug 

Last Reviewed: April 3, 1999