question about milter software

[Wojciech Puchar]

> I think you'll find Postfix to be much more modern and easy to work
> with for that kind of message rewriting.

you are actually wrong in that statement. In spite of hype that 
postscript started with, i am still using sendmail because it is actually 
easiest if you learn it.

>
> But what you're looking for is pretty complicated when you start
> having to deal with multipart messages; the messages have to be

this is unfortunately true, because i could quickly do myself a filter 
that would trivially append footer, but it will not work.

That's the reason of my question - IF such (quite complex) software is 
already written.