Bruce Lilly writes:
It might make sense to put transport-related additions (trace fields,
List- fields, etc.) in a separate place ("envelope") distinct from
the end-to-end, user-to-user message header (date, to/from/cc,
subject, etc.).
Either way, it's something different from what we have now.
It does sound a bit like an S/MIME message, doesn't it?
Arnt