On Tue, Jun 17, 2008 at 01:37:59PM -0300, Eduardo M KALINOWSKI wrote: > On Tue, 17 Jun 2008 17:34:02 +0200, [EMAIL PROTECTED] > ([EMAIL PROTECTED]) wrote: > >I have exim4 (exim4-daemon-heavy) running on etch. > > > >This machine has only a few users who send directly. One of them has > >an ISP who seems to have a broken DNS setup. > > > >The symptom I see is that when this user connects to the server (port 25 > >or 587) there is a large delay before the 220 banner is shown e.g.: > > > >[snip] > > > >Is it possible to whitelist a range or turn off the check? > > There is a debconf option that minimizes DNS lookups. It should solve > this problem, but it might disable the lookups also in places where > you might want them.
OK - just tried that. Seems to set the host_lookup to empty instead of * and yes - the 220 banner is now instant. I wonder if there is a way to say that host_lookup is everything except a range though? It would be great to be able to say all hosts except the IPs in this ISP's dial up ranges. Anyhow - I'm going to leave it running for a couple of weeks (am off net for two weeks soon) and will see if it causes any issues. Thanks for your pointer ;) -- Chris Searle -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]