There was a record for the domain, however, it contained the name of the
mail server (i.e. <mmil.workdomain.com>)
Just in case I deleted it and restarted the server to no avail.
I also grep'd all the files under dnscache looking for the ip address
and did not find it.
Dmitriy Vitoshnov wrote:
Xmail have folder dnscache.
I think that there is a copy of the MX-recording with your old IP-address.
Vitoshnov Dmitriy
-----Original Message-----
From: xmail-boun...@xmailserver.org [mailto:xmail-
boun...@xmailserver.org] On Behalf Of gilad
Sent: Friday, June 18, 2010 11:38 AM
To: xmail@xmailserver.org
Subject: [xmail] DNS Madness
Where does xmail get the ip address for a domain name?
I run my own home xmail server (on pclinuxos) and a forwarding only
named on a home server machine. It uses my personal domain name.
At work I also run an xmail server (on centos) using my company's
domain
name (different from my personal domain name.)
Few days ago the IP address for the work server has changed. Now my
home
xmail server can't deliver email an account on the work server. It
seems xmail on the home machine resolves the company's domain name to
its old ip address. I verified this by looking at the outgoing traffic
from that machine.
However, on the same machine running various dns tools
(host,nslookup,dig) all correctly show the new address for the work
mail
server. Also I can connect to it using telnet. However the mail server
tries to connect to the old address.
I finally gave up on finding where the problem is and set up an
iptables rule to modify outgoing traffic to the old address to go to
the
new address, and voila the home mail server now connects to the work
mail server and works.
As a reference the iptables rule on the home mail server machine looks
like this:
iptables -t nat -A OUTPUT -d <work mail server old ip address> -j DNAT
--to <work mail server new ip address>
Again, on the home server machine (where the confused xmail server
runs)
dig <workdomain.com> mx
returns correctly return <mmil.workdomain.com> and
dig <mail.workdomain.com>
correctly returns the new ip address.
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