At 11:31 14-01-11, Dave CROCKER wrote:
A list member sends a message that contains a MIME body. (If it
makes a difference between a simple, since body that is MIME
encoded, versus one that has "attachments", then clarifying that is
part of the exercise.)
The mail list adds a typical footer to the message and sends it out.
How does the footer related to the received MIME? Is a new MIME
body created? Is the footer added as a separate MIME attachment? Is
the footer somehow distinguishable from the original MIME content?
When the original message is posted as text/plain, the footer is
appended as text at the end of the message. If the original message
is posted as text/html, The footer is inserted near the end of the
message inside the appropriate HTML tags.
If the original message is multipart/alternative, it can sometimes be
reformatted as multipart/mixed and a new MIME part is appended for
the footer. The footer is not distinguishable from the original MIME
content unless we resort to heuristics.