On Tue, 3 Jun 1997, Nigel Metheringham wrote:
> There have been some people asking for some level of general header
> munging. If the functionality that smail had could be added in somewhere
> (smail did this on the transports), then this (bcc removal) and a few
> other problems would fall out in the wash.
>
> Smail had the capability to:-
> - delete a header
> - prepend a header
> - append a header
The next release of Exim has a transport filter feature. You can cause a
message to be run through an external filter as it is transported. You
can then munge the message any way you like in the filter. An expanded
argument list allows you to pass over sender address, recipient
addreses, host IP number, or any other available data. Some kind of
general-purpose configurable munger could usefully be written. Of
course, this costs additional resources (2 additional processes: the
filter itself and a clone of Exim to write the message to it).
A simpler facility like smail's would be cheaper. It might not be too
hard to do. I will think about it (i.e. I've put it on the Wish List).
Philip
--
Philip Hazel University Computing Service,
ph10@??? New Museums Site, Cambridge CB2 3QG,
P.Hazel@??? England. Phone: +44 1223 334714
