[Mimedefang] Playing with headers

[Kevin A. McGrail]

> If there are no "Cc" headers, it will silently do nothing.

David's given a better answer than either of us BUT I wanted to let you know
that my understanding and the docs differ with your understanding of
action_change_header.  Specifically ' If the header does not exist, then a
header with the given name and value is added.'

>From the man pages:

 action_change_header($hdr, $val, $index)

   Changes  an  existing  header in the message. This can be used in
filter_begin or filter_end.  The $hdr parameter is the header name without
the
              colon, and $val is the header value.  If the header does not
exist, then a header with the given name and value is added.

Regards,
KAM