Domain not found when using LDN nameserver (80.67.188.188)

,

Hello,

My YunoHost server

I have two YunoHost servers (two different domains) with following config:

Hardware: VPS bought online
YunoHost version: 3.7.1.1
I have access to my server : Through SSH | through the webadmin
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no

Description of my issue

Since 21/05/2020, I noticed that some legit mails are rejected or not sent by my YunoHost server. Issue is completely random.

Example error message I see in /var/log/mail.log is:

$ sudo zgrep -i "Domain not found" /var/log/mail.log*
/var/log/mail.log:Jun  1 14:03:34 azyx postfix/smtpd[17258]: NOQUEUE: reject: RCPT from unknown[51.68.43.218]: 450 4.1.8 <REDACTED@actilis.net>: Sender address rejected: Domain not found; from=<REDACTED@actilis.net> to=<REDACTED@azyx.fr> proto=ESMTP helo=<smtp.actilis.fr>
[..]

I got same kind of message on my two YunoHost servers for different domains.

I modified my dnsmasq configuration in order to log queries. Now in /etc/default/dsnmasq, I had:

[..]
DNSMASQ_OPTS="--log-queries"
[..]

Each error message in /var/log/mail.log is related to a query to 80.67.188.188 DNS server which is a LDN server according to resolv.dnsmasq.conf.

Example in /var/log/syslog:

Jun  1 14:03:34 azyx dnsmasq[26771]: query[MX] actilis.net from 127.0.0.1                                                                                                                                        
Jun  1 14:03:34 azyx dnsmasq[26771]: forwarded actilis.net to 80.67.188.188                                                                                                                                     
Jun  1 14:03:34 azyx dnsmasq[26771]: query[MX] actilis.net from 127.0.0.1                                                                                                                                        
Jun  1 14:03:34 azyx dnsmasq[26771]: forwarded actilis.net to 80.67.188.188                                                                                                                                      
Jun  1 14:03:34 azyx dnsmasq[26771]: query[A] actilis.net from 127.0.0.1                                                                                                                                         
Jun  1 14:03:34 azyx dnsmasq[26771]: forwarded actilis.net to 80.67.188.188                                                                                                                                      
Jun  1 14:03:34 azyx dnsmasq[26771]: query[A] actilis.net from 127.0.0.1                                                                                                                                         
Jun  1 14:03:34 azyx dnsmasq[26771]: forwarded actilis.net to 80.67.188.188                                                                                                                                      
Jun  1 14:03:34 azyx dnsmasq[26771]: query[AAAA] actilis.net from 127.0.0.1                                                                                                                                      
Jun  1 14:03:34 azyx dnsmasq[26771]: forwarded actilis.net to 80.67.188.188                                                                                                                                      
Jun  1 14:03:34 azyx dnsmasq[26771]: query[AAAA] actilis.net from 127.0.0.1                                                                                                                                      
Jun  1 14:03:34 azyx dnsmasq[26771]: forwarded actilis.net to 80.67.188.188  

I didn’t get any answer and the next message in /var/log/syslog is the one posted above.

Hopefully, messages are delivered when mail server make a new attempt and YunoHost server use a different DNS server.

I supposed there is some LDN administrators on the forum that can help me troubleshoot the issue.

I’m also interested if some people noticed same behavior on their ynh servers.

Anybody have a contact at LDN ?

@Aleks, could you help me solve this problem ? I prefer an upstream solution in place of putting DNS server 80.67.188.188 in comment.

Suite à question posée sur IRC :

Aleks │ chépa si quelqu’un gère le DNS de ldn mais on a quelqu’un sur le forum qui rapport un soucis
petrus │ la zone est mal fichue
petrus │ 212.83.186.116 /dns2.actilis.net est listé comme ns glue de la zone
petrus │ mais il n’est pas NS dans la zone, et il ne répond pas
Aleks │ petrus: du coup pour toi c’est un probleme dans la zone et pas trop du côté de LDN ?
petrus │ Aleks: je dirais que oui y’a un soucis dans la zone qui est peut-être manifesté par une configuration spécifique / exigeante coté ldn

1 Like

Hi @Aleks and @petrus,

Thanks for your feedback. As I mentioned previously, I have this behavior with several domains (not only actilis.net). I’m not sure issue is related to source or destination domains.

Thanks.

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