OT - Greylisting (was: Re: gOCR SpamAssassin plugin)

[mikea]

On Sat, Aug 12, 2006 at 04:03:48PM +0100, Denis Croombs wrote:
> > >> Greylisting decreases load immeasurably on a mailscanner 
> > system, the 
> > >> cost of greylisting is much less then allowing the message to go 
> > >> through the mailscanner sytem. I deployed it several 
> > months ago, it 
> > >> really is a good tool, and I've had very few complaints 
> > (10000 users).
> > > 
> > > I just use Sendmails greet pause which is 10 seconds to set up and 
> > > works a treat - does greylisting add significant control or 
> > > improvement over that?  Anybody using them in tandom or is 
> > one or the 
> > > other to be preferred?
> > 
> > I use both, and I have had to turn the greetpause setting 
> > down to about
> > 2 or 3 seconds, as some systems (such as NTMail) don't check 
> > properly for the welcome message before sending the HELO or 
> > EHLO. At that sort of setting, it has little benefit. And 
> > there is no easy way to set up a whitelist with greetpause.
> > 
> > Greylisting (using milter-greylist) has a superb little 
> > whitelist facility, and shares the current greylist database 
> > between multiple MX's with minimal effort, using a TCP 
> > connection between each one.
> 
> I have been trying to install milter-greylist all day on my sendmail 8.12 &
> 8.13 systems (Redhat & Centos mixture), but keep getting the error "checking
> for smfi_register in -lmilter -lsm... no
> checking for smfi_register in -lmilter -lsmutil... no
> Required libmilter not found. Use --with-libmilter"
> 
> I have tried google, but as yet have not found the answer, has any kind
> person give me a clue ?

You have to download and install libmilter to get pretty much any of 
Anthony Howe's milters to run. 

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin