[Mimedefang] prepend boilerplate ?

[Joseph Brennan]

If all email was still plain text, nothing to it!

You're proposing either to parse HTML code and rewrite it
appropriately, or to rebuild the MIME structure with new parts at the
beginning. Either of those would be an "interesting" exercise in
mimedefang filter coding given the many possibilities you could
encounter.

If this is for outbound, in an ideal world I think the software
creating the message has the job of inserting the boilerplate, and the
software filtering the message has the job of verifying that the
boilerplate is there and rejecting if not.

Joseph Brennan
Columbia University