XFOR: SMTP Headers That the Exchange IMC Understands

• Microsoft Exchange Server, version 4.0

SUMMARY

The Microsoft Exchange version 4.0 Internet Mail Connector (IMC) only understands the following header information of incoming messages sent from SMTP Hosts:

   Received....
   to:
   from:
   date:
   subject:
   reply-to:
   Message-ID:
   x-ms-attachment:
   resend-to:
   return-receipt-to:
   encoding:
   MIME version 1.0
   content-type:
   content-transfer-encoding:
   content-disposition:  ; this is for incoming mail only

Resent-from: Content-type: multipart/appledouble Content-type: application/applefile Encoding: x-binhex

MORE INFORMATION

When an SMTP Host connects to the Microsoft Exchange IMC, there are certain headers sent by the SMTP Host that the Microsoft Exchange IMC uses to determine the actions to perform. The headers listed above are the headers that the Microsoft Exchange IMC understands. If any other headers are received by the Microsoft Exchange IMC, the message will be accepted and the unknown headers will be ignored.

To save headers in the Microsoft Windows NT Event Log, start the Microsoft Exchange Administrator program, open the property page for the Microsoft Exchange IMC, choose the Diagnostic Logging tab, and set the Logging level to Maximum.