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

• Microsoft Exchange Server, version 4.0

SUMMARY

The Microsoft Exchange Internet Mail Connector (IMC) creates a file and copies failed messages to the file. The file has an ATT, TXT, or DAT extension. The file extension assignment is done in the following manner:

   - If an inbound conversion fails, the raw message is copied to a
     file with the TXT file extension. For example, the file name
     can be Att00xxx.txt.

   - MIME messages. If a parameter is not found in the headers that
     can be used as an attachment name, IMC creates a file with the
     ATT file extension (either from the MIME Type configuration or
     Content-Type header information). If the MIME Content-Type is
     configured in the property page, the file with the ATT file
     extension is used. If the Content-Type is not configured, the
     file with the DAT file extension is used.

   - If no file name information is detected for non-MIME messages
     (in X-MS-Attachment header or Begin header) and the bodypart is
     a UUENCODED bodypart, IMC creates a file with the DAT file
     extension.