Thanks for the the reply Phil.
I did think the /ect/hosts file would have been sufficient for Exim to
resolve 127.0.0.1 or localhost but I do not think Exim is trying the hosts
file first.
This is what I have
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 host01 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
I can ping localhost but not nslookup which I would expect as nslookup uses
a DNS server to resolve the address.
Do I need to tell Exim to use the hosts file?
Is there an option to turn off all lookups and accept mail submitted by
localhost?
Best regards
J
-----Original Message-----
From: Phil Pennock
Sent: Saturday, October 13, 2012 10:47 PM
To: Jonathan White
Cc: [email protected]
Subject: Re: [exim] Centos Application Applience Routing mail to relay
On 2012-10-13 at 12:41 +0100, Jonathan White wrote:
When I run a debug it looks like Exim is trying to perform a DNS
lookup of 127.0.0.1
Eventually the lookup times out and the mail is sent. What's correct
way to resolve the issue? Is there further lookups to disable or can
exim resolve 127.0.0.1 via another method other than a DNS server?
Put it in /etc/hosts.
That _should_ work.
Note that part of the issue here is that Exim assumes it can resolve the
local hostname. "@" is Exim for "the hostname of the host that I'm
running on".
If you keep hitting DNS issues on the appliance, you might consider
something like dnsmasq -- it's a server designed to be very small, for
use on home routers where memory is tight. You can configure it with
appropriate dummy data.
(Note that /etc/hosts is not normally a good solution for DNS issues,
just a way to store up issues for later, but I tend to believe that
localhost and the hostname of the machine itself should be in
/etc/hosts, so that basic self-resolution can work without a network
connection).
-Phil
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