Milter-greylist

At Fri, 03 Nov 2006 14:04:14 -0500,
Matt Kettler wrote:
> > 
> > But this:
> > 
> >   acl greylist domain /[0-9][0-9]*\-[0-9][0-9]*\-[0-9][0-9]*/
> >   acl greylist domain /[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*/
> > 
> > which I still firmly believe are terrible for performance.
> 
> Agreed. Those could be terrible, at least for some inputs.

A little offtopic: they are not too bad. No backtracking for any
input. * don't do harm if * part and its following part are mutually
exclusive. For example:
\[.*\] causes backtracking
\[[^]]*\] doesn't cause any backtracking