Re: DNS Madness

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: [email protected] [mailto:xmail-
> [email protected]] On Behalf Of gilad
> Sent: Friday, June 18, 2010 11:38 AM
> To: [email protected]
> 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 <amil.workdomain.com> and
> dig <mail.workdomain.com>
> correctly returns the new ip address.
> 
> _______________________________________________
> xmail mailing list
> [email protected]
> http://xmailserver.org/mailman/listinfo/xmail

_______________________________________________
xmail mailing list
[email protected]
http://xmailserver.org/mailman/listinfo/xmail