> I ran my own and later Claus's Assman's *.mc stuff on 8.8.X.  Under
> 8.8.8 you can't filter on (internal) header data.  Thats a *very* big
> lose. Check your spam sometime and see how many realy easy kills you
> get by filtering on any of the following headers:
> 	To: friend@public.com
>	X-UIDL:  *
>	X-PMFLAGS: *
>	X-COMMENTS: Authenticated sender is *
>	DATE: x________*
>	X-MAILER:  <one of several spam mailers>

Can sendmail 8.9.0 reject mail due to non-envelope headers before receiving
the entire message?  It's not too hard to set up procmail filtering to nail
these (I nail these and a few others), but that's after inhaling the whole
message.  (It also requires a fork and exec, but procmail will also do local
delivery, so it's no worse for real mail.)