And if you running debian you can set the min-cache-ttl.. That bind is patched with : https://anonscm.debian.org/cgit/users/lamont/bind9.git/commit/?h=patches&id=84fa402750fab5cd887d357501e2896494ac551f
So you can set these if needed. min-cache-ttl 90; min-ncache-ttl 90; Greetz, Louis > -----Oorspronkelijk bericht----- > Van: si...@simonandkate.net > [mailto:owner-postfix-us...@postfix.org] Namens Simon Wilson > Verzonden: maandag 1 mei 2017 11:20 > Aan: Marco Pizzoli > CC: Postfix users > Onderwerp: Re: Optimising new system and postscreen questions > > ----- Message from Marco Pizzoli <marco.pizz...@gmail.com> --------- > Date: Mon, 1 May 2017 11:18:30 +0200 > From: Marco Pizzoli <marco.pizz...@gmail.com> > Subject: Re: Optimising new system and postscreen questions > To: si...@simonandkate.net > Cc: Postfix users <postfix-users@postfix.org> > > > > Hello Simon, > > > > The server runs local caching DNS BIND, so it's as quick as > I can get > > it on > >> the slow Internet connection we are on. > >> > > > > I don't qualify mysef expert enough to answer the rest of > your points, > > but for the DNS part I suggest you think about replacing BIND with > > Unbound, as the DNS resolver. It has a property called min_ttl that > > permits you to impose a minimum amount of TTL to the > entries reported. > > DNSBL have always real low TTL values, on purpose. If you > are fne with > > relaxing this real-timeness, well by setting a value of i.e. 60/90 > > seconds it will permit you to reduce the network dependency. > > > > Worth a try. > > Marco > > Thanks Marco, I'll investigate that. :) > > Simon > > -- > Simon Wilson > M: 0400 12 11 16 > >
