The following are the general properties for a message:
PR_ACKNOWLEDGEMENT_MODE
PR_AUTHORIZING_USERS
PR_CORRELATE
PR_CORRELATE_MTSID
PR_DELETE_AFTER_SUBMIT
PR_DISCLOSURE_OF_RECIPIENTS
PR_DL_EXPANSION_HISTORY
PR_DL_EXPANSION_PROHIBITED
PR_INCOMPLETE_COPY
PR_LANGUAGES
PR_MESSAGE_CLASS
PR_MESSAGE_DELIVERY_ID
PR_MESSAGE_FLAGS
PR_MESSAGE_SECURITY_LABEL
PR_MESSAGE_SIZE
PR_MESSAGE_SUBMISSION_ID
PR_MESSAGE_TOKEN
PR_MSG_STATUS
PR_ORIG_MESSAGE_CLASS
PR_RECIPIENT_REASSIGNMENT_PROHIBITED
PR_REPLY_RECIPIENT_ENTRIES
PR_REPLY_RECIPIENT_NAMES
PR_REPLY_REQUESTED
PR_REQUESTED_DELIVERY_METHOD
PR_TRANSPORT_MESSAGE_HEADERS
PR_X400_CONTENT_TYPE
For more information on message properties, see About Message Properties.