Date: Mon, 17 Jul 2006 09:33:42 -0600 From: mike <mike@coloradosurf.com> To: Bas Hendriks <bas@cybox.nl> Cc: freebsd-isp@freebsd.org Subject: Re: Sendmail: Deferred: Name server: xxx.xxx.xxx: host name lookup failure Message-ID: <20060717153342.GA45037@coloradosurf.com> In-Reply-To: <44BB9EFE.8040409@cybox.nl> References: <44BB9EFE.8040409@cybox.nl>
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To add on... I was using sendmail/mimedefang/clamav on freebsd6.0 (w/ probably 8.13.4 before the patch) and got the same issue. It only seemed to have the problem w/ my local domain. I resolved it by running bind on the local server w/ records for my local domain and having forwarders point to my normal internal nameservers (M$). Before switching my resolv.conf to point to localhost, it resolved all domains correctly (via dig), but I kept getting those same errors from sendmail. I think even putting it in /etc/hosts didn't work. Anyhow, the workaround came through and I haven't looked back, but it sure would be nice to understand this one better. It seems googling brought up some stuff w/ sendmail not playing nice w/ M$ nameservers (or switch these around if you prefer to lay appropriate blame) not working in certain instances but I forget the details. This may or may not be related. mike On Mon, Jul 17, 2006 at 04:30:22PM +0200, Bas Hendriks wrote: > Date: Mon, 17 Jul 2006 16:30:22 +0200 > From: Bas Hendriks <bas@cybox.nl> > To: freebsd-isp@freebsd.org > Subject: Sendmail: Deferred: Name server: xxx.xxx.xxx: host name lookup > failure > > Hello, > > I have a problem with one of my servers, > Suddenly i am getting a lot of "Deferred: Name server: xxx.xxx.xxx: host > name lookup failure" while DNS resolving on that box is ok(from the > command line de backend servers do resolve and are reachable). The mail > stays in the mailqueue. > > This is a mailscanning server (Mailscanner/Spamassasin/Clamav), witch > functions as primary mx for several domains, after receiving mail it > forwards this mail to backend servers(Using mailertable: domain.com > smtp:backendserver-n.xxxx.xx). > > Any pointers on how to debug this would be appreciated! > > Best regards, > Bas Hendriks > > -- > extra info: > [bas@mailscanner bas]$uname -a > FreeBSD mailscanner.xxxxxx.xxx 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Thu Nov > 3 09:36:13 UTC 2005 root@x64.samsco.home:/usr/obj/usr/src/sys/GENERIC > i386 > [bas@mailscanner bas]$telnet 0 25 > Trying 0.0.0.0... > Connected to 0. > Escape character is '^]'. > 220 mailscanner.xxxxxx.xxx ESMTP Sendmail 8.13.4/8.13.4; Mon, 17 Jul 2006 > 16:19:58 +0200 (CEST) > > > > _______________________________________________ > freebsd-isp@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-isp > To unsubscribe, send any mail to "freebsd-isp-unsubscribe@freebsd.org"
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