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Date: Mon, 5 Jan 1998 20:31:48 -0800 (PST)
From: Doug White <dwhite@gdi.uoregon.edu>
Reply-To: Doug White <dwhite@resnet.uoregon.edu>
To: Paul Coyne <pcoyne@br-inc.com>
cc: freebsd-questions@FreeBSD.ORG
Subject: Re: sendmail host map lookup timeout
In-Reply-To: <vines.ah49+OHFgoA@ftw9vnssvr.moinet.com>
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On Mon, 5 Jan 1998, Paul Coyne wrote:

> I have a machine configured as a  relay host for all machines that can send 
> mail from our net.
> 
> The machine handles thousands of messages a day, but the queue will grow to 
> 100-200 messages with most of the items in the queue showing as below (I 
> have substituted 'username' for the real username)
> 
> LAA07452      276 Mon Jan  5 11:12 <username@br-inc.com>
>                  (host map: lookup (gmacalgary.com): deferred)
>                                    <username@gmacalgary.com>
> LAA07471     1443 Mon Jan  5 11:13 <username@br-inc.com>
>                  (host map: lookup (anheuser-busch.com): deferred)
>                                    <username@anheuser-busch.com>
> LAA07283     1731 Mon Jan  5 11:02 <username@br-inc.com>
>                  (host map: lookup (tobindatag.com): deferred)
>                                    <username@tobindatag.com>
> KAA07186      882 Mon Jan  5 10:59 <username@br-inc.com>
>                  (host map: lookup (naplesnews.com): deferred)
>                                    <username@naplesnews.com>           
>           
> 
> What is going on?

The NS lookup is croaking.  

> 
> I try nslookup, and the domain resolves (MX and/or A records).   Why does 
> sendmail dns call fail?

It may not have gotten around to re-processing those messages yet, and you
had a temporary DNS outage.  If they don't go away in say a day, then get
worried.

> Machine is Pentium 200, 32MB, 2.2.5-RELEASE, runs named as secondary DNS 
> locally (forwarder/slave to firewall) and sendmail with virtusertable stuff,
>  but otherwise a pretty generic configuration.

I assume you have a full-time LAN link.

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major