LinuxQuestions.org - undeliverable mail !!!

- Linux - Networking (https://www.linuxquestions.org/questions/linux-networking-3/)

- - undeliverable mail !!! (https://www.linuxquestions.org/questions/linux-networking-3/undeliverable-mail-450331/)

undeliverable mail !!!

Quote:

This is the Postfix program at host mail.gabrix.ath.cx.

####################################################################
# THIS IS A WARNING ONLY. YOU DO NOT NEED TO RESEND YOUR MESSAGE. #
####################################################################

Your message could not be delivered for 4.0 hours.
It will be retried until it is 5.0 days old.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The Postfix program

<sickuser@gmail.com>: Host or domain name not found. Name service error for
name=gmail.com type=MX: Host not found, try again

Reporting-MTA: dns; mail.gabrix.ath.cx
X-Postfix-Queue-ID: D26A89A808
X-Postfix-Sender: rfc822; gabrix@gabrix.ath.cx
Arrival-Date: Wed, 31 May 2006 15:44:33 +0200 (CEST)

Final-Recipient: rfc822; sickuser@gmail.com
Action: delayed
Status: 4.0.0
Diagnostic-Code: X-Postfix; Host or domain name not found. Name service error
for name=gmail.com type=MX: Host not found, try again
Will-Retry-Until: Mon, 5 Jun 2006 15:44:33 +0200 (CEST)

Received: from [192.168.1.4] (www.gabrix.ath.cx [192.168.1.4])
by mail.gabrix.ath.cx (Postfix) with ESMTP id D26A89A808
for <sickuser@gmail.com>; Wed, 31 May 2006 15:44:33 +0200 (CEST)
Message-ID: <447D9D71.8090500@gabrix.ath.cx>
Date: Wed, 31 May 2006 15:43:13 +0200
From: gabrix <gabrix@gabrix.ath.cx>
User-Agent: Mozilla Thunderbird 1.5.0.2 (X11/20060420)
MIME-Version: 1.0
To: sickuser@gmail.com
Subject: prova
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit

I't s for sure a resolution dns problem my network doesn't look affected by this problem in internet browsing .Am i correct ?
Another sick question :scratch: ... !!!!

It definitely looks like a name resolution problem--the mail server is unable to find the MX records for gmail.com. Check that you have valid nameservers in /etc/resolv.conf--it might be that the DNS service on the first one listed there is down,, or something similar.

Quote:

root@argo:~# netstat -anptlu|grep dnsmasq
tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 2135/dnsmasq
tcp 0 0 192.168.1.1:53 0.0.0.0:* LISTEN 2135/dnsmasq
udp 0 0 0.0.0.0:32780 0.0.0.0:* 2135/dnsmasq
udp 0 0 127.0.0.1:53 0.0.0.0:* 2135/dnsmasq
udp 0 0 192.168.1.1:53 0.0.0.0:* 2135/dnsmasq

192.168.1.1 is my lan interface and it is in /etc/resol.conf as the other dns i have on the router .I will try adding also my dns'isps ...

Can you ping gmail.com or av.com? Are you sure you can connect your Linux box to the outside world? Try 'ftp ftp.kernel.org' and tell me if that command returns the ftp logon screen.

Quote:

root@mail:~# ftp ftp.kernel.org
Connected to zeus-pub.kernel.org.
220 Welcome to ftp.kernel.org.
Name (ftp.kernel.org:gabrix):

I have added my isp'dns to /etc/resolv.conf and i got mail delivered to my account at gmail.com .If i get more errors i will let you know,cheers guys the feedback i get posting here helps me a lot !