Many thanks Dmitriy!
I had forgot my home xmail server used to be a relay for my work one.
Not anymore, however, I never removed the configuration.
In order to better filter spam, I had to set a domain for my company on
this server and the ip address actually is in mailproc.tab under
MailRoot/domains/<domain>
Dmitriy Vitoshnov wrote:
Another reason for such work can be in file "smtpfwd.tab"
Vitoshnov Dmitriy
-----Original Message-----
From: xmail-boun...@xmailserver.org [mailto:xmail-
boun...@xmailserver.org] On Behalf Of gilad
Sent: Friday, June 18, 2010 12:47 PM
To: XMail Users Mailing List
Subject: Re: [xmail] DNS Madness
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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