WHy I add a header.  procmail catches the header and dumps it into
likelyspam/norelay

Every month, I get 4 or 5 important messages in there.

Never edit the cf.  Edit the m4 and build the cf.

Quoting kpneal@pobox.com (kpneal@pobox.com):
> On Wed, Jul 03, 2002 at 03:11:29PM -0700, sudog@sudog.com wrote:
> > > Better on comp.mail.sendmail, but several bad ideas here
> > >
> > > FORGED:
> > >    perfectly legal, also common on fine mail.  My machine
> > >    introduces itself as the inside interface.  (EHLO
> > >    inside.domain.com) Not illegal but will show up as forged.
>  
>  
> > > TEMP: can't resolve for now but you send a 550.  Use a 4xx error back.
> > 
> > This should probably be a 4xx.
> 
> I hate this. The only mail I ever get where the reverse DNS lookup
> fails are from spammers sending email from cable modems. I hate having
> to edit the sendmail.cf file by hand, but I hate more watching a spam
> hit my server dozens of times over several days before it times out.
> -- 
> "A method for inducing cats to exercise consists of directing a beam of
> invisible light produced by a hand-held laser apparatus onto the floor ...
> in the vicinity of the cat, then moving the laser ... in an irregular way
> fascinating to cats,..." -- US patent 5443036, "Method of exercising a cat"