The problem with format=flowed, is that it just
doesn't work well with
older mail clients.
It doesn't work particularly well for anyone reading the mailing list archive
via the web interface either. However, I can't tell whether the correct header
is present or not in the affected messages as the web interface does not
reveal the headers.
(It works fine if reading messages in VMS mail, until an attempt to reply is
made and everything turns out to be on one line...)
Regards,
Peter Coghlan.