In the current MIME spec. the following paragraph is included
discussing message/partial reassembly:
(2) Only those header fields in the enclosed message which start
with "Content-" and Message-ID", "Encrypted", and "MIME-Version"
must be appended, in order, to the header fields of the new
message. Any header fields in the enclosed message which do not
start with "Content-" (except for "Message-ID", "Encrypted", and
"MIME-Version") will be ignored.
(on Page 40)
Why is this restriction made? Why should the other headers be
ignored and why does the "order" of the headers have to be
The Wollongong Advanced Applications Center
Santa Cruz, CA.