Add an IETF value to the header.
Syntax:
Parameters:
Returns:
Returns 1 if successful; otherwise returns 0 if the operation failed.
Remarks:
The IETF value only needs to be added once for any one instance of a mailDocument object. Adding the IETF value to an instance of a header type makes the value available to other header types (headers having the same name) in other messages in the mailDocument object.