What type of hardware are you using: Old laptop or computer
What YunoHost version are you running: 12.0.17
How are you able to access your server: The webadmin
SSH
Direct access via physical keyboard/screen
Are you in a special context or did you perform specific tweaking on your YunoHost instance ?: non
Describe your issue
Ceci est la suite de ce post : "Host or domain name not found" même si l'adresse mail existe et fonctionne
Share relevant logs or error messages
Voici les logs que j’ai lors de l’envoi d’un mail en faisant la commande cat /var/log/syslog :
Sep 6 19:05:33 serveur postfix/submission/smtpd[554657]: connect from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38]
Sep 6 19:05:33 serveur postfix/submission/smtpd[554657]: warning: non-SMTP command from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38]: GET / HTTP/1.1
Sep 6 19:05:33 serveur postfix/submission/smtpd[554657]: disconnect from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38] unknown=0/1 commands=0/1
Sep 6 19:05:34 serveur postfix/submission/smtpd[554657]: connect from unknown[2a01:e0a:c17:0000:0000:0000:0000:0000]
Sep 6 19:05:34 serveur postfix/submission/smtpd[554657]: Anonymous TLS connection established from unknown[2a01:e0a:c17:0000:0000:0000:0000:0000] to serveur.remplacedDomain.fr: TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (3072 bits) server-digest SHA256
Sep 6 19:05:34 serveur postfix/submission/smtpd[554657]: 88AADD429C4: client=unknown[2a01:e0a:c17:0000:0000:0000:0000:0000], sasl_method=PLAIN, sasl_username=RemplacedName
Sep 6 19:05:34 serveur postsrsd[554679]: srs_forward: <RemplacedName@remplacedDomain.fr> not rewritten: Domain excluded by policy
Sep 6 19:05:34 serveur postfix/cleanup[554678]: 88AADD429C4: message-id=<59a06dee-afad-4367-b0d4-ab2a2a6f4e74@remplacedDomain.fr>
Sep 6 19:05:34 serveur opendkim[1076]: 88AADD429C4: DKIM-Signature field added (s=mail, d=remplacedDomain.fr)
Sep 6 19:05:34 serveur postfix/qmgr[960949]: 88AADD429C4: from=<RemplacedName@remplacedDomain.fr>, size=14861, nrcpt=2 (queue active)
Sep 6 19:05:34 serveur postfix/smtp[554682]: warning: no MX host for notaires.fr has a valid address record
Sep 6 19:05:34 serveur postfix/smtp[554682]: 88AADD429C4: to=<adresseDestinataire1@notaires.fr>, relay=none, delay=0.22, delays=0.13/0.08/0.01/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=mx-55162650.mail.eu.retarus.com type=AAAA: Host not found)
Sep 6 19:05:34 serveur postfix/smtp[554682]: 88AADD429C4: to=<adresseDestinataire2@notaires.fr>, relay=none, delay=0.22, delays=0.13/0.08/0.01/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=mx-55162650.mail.eu.retarus.com type=AAAA: Host not found)
Sep 6 19:05:34 serveur postsrsd[554679]: srs_forward: <""> not rewritten: No at sign in sender address
Sep 6 19:05:34 serveur postfix/cleanup[554678]: BFF45D42FFA: message-id=<20250906170534.BFF45D42FFA@serveur.remplacedDomain.fr>
Sep 6 19:05:34 serveur postfix/bounce[554683]: 88AADD429C4: sender non-delivery notification: BFF45D42FFA
Sep 6 19:05:34 serveur postfix/qmgr[960949]: BFF45D42FFA: from=<>, size=17787, nrcpt=1 (queue active)
Sep 6 19:05:34 serveur postfix/qmgr[960949]: 88AADD429C4: removed
Sep 6 19:05:34 serveur dovecot: lda(RemplacedName@serveur.remplacedDomain.fr)<554686><X+zBMd5pvGi+dggAv9PdYA>: sieve: msgid=<20250906170534.BFF45D42FFA@serveur.remplacedDomain.fr>: stored mail into mailbox 'INBOX'
Sep 6 19:05:34 serveur postfix/pipe[554684]: BFF45D42FFA: to=<RemplacedName@serveur.remplacedDomain.fr>, orig_to=<RemplacedName@remplacedDomain.fr>, relay=dovecot, delay=0.07, delays=0.01/0.01/0/0.05, dsn=2.0.0, status=sent (delivered via dovecot service)
Sep 6 19:05:34 serveur postfix/qmgr[960949]: BFF45D42FFA: removed
Sep 6 19:05:35 serveur dovecot: imap(RemplacedName)<547811><uxcGzSQ+ELcqAQ4KDBdI0BVFxLs1dSE7>: Disconnected: Logged out in=15374 out=4461 deleted=1 expunged=12 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
Sep 6 19:05:39 serveur postfix/submission/smtpd[554657]: disconnect from unknown[2a01:e0a:c17:0000:0000:0000:0000:0000] ehlo=2 starttls=1 auth=1 mail=1 rcpt=2 data=1 quit=1 commands=9
Sep 6 19:07:03 serveur postfix/submission/smtpd[554657]: connect from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38]
Sep 6 19:07:03 serveur postfix/submission/smtpd[554657]: improper command pipelining after CONNECT from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38]: \026\003\001\000{\001\000\000w\003\003\032\214\374\021\274\327\376s\253\321\316\377\304\234\004F\330\275voPj\307\273l\365\373K\rTS\314\000\000\032\300/\300+\300\021\300\a\300\023\300\t\300\024\300\n\000\005\000/\0005\300\022\000\n\001\000\0004\000\005\000\005\001\000\000\000\000\000\n\000\b\000\006\000\027\000\030\000\031\000\v\000
Sep 6 19:07:03 serveur postfix/submission/smtpd[554657]: warning: non-SMTP command from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38]: \026\003\001\000{\001\000\000w\003\003\032\214\374\021\274\327\376s\253\321\316\377\304\234\004F\330
Sep 6 19:07:03 serveur postfix/submission/smtpd[554657]: disconnect from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38] unknown=0/1 commands=0/1
Sep 6 19:07:36 serveur postfix/submission/smtpd[554657]: connect from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38]
Sep 6 19:07:36 serveur postfix/submission/smtpd[554657]: lost connection after CONNECT from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38]
Sep 6 19:07:36 serveur postfix/submission/smtpd[554657]: disconnect from ec2-3-131-215-38.us-east-2.compute.amazonaws.com[3.131.215.38] commands=0/0
Sep 6 19:07:40 serveur dovecot: imap-login: Disconnected: Connection closed (no auth attempts in 0 secs): user=<>, rip=80.67.164.12, lip=192.168.0.144, TLS handshaking: Connection closed, session=<tJzz/SQ+VJJQQ6QM>
Sep 6 19:07:40 serveur postfix/submission/smtpd[554657]: connect from yunohost.org[80.67.164.12]
Sep 6 19:07:40 serveur postfix/submission/smtpd[554657]: lost connection after CONNECT from yunohost.org[80.67.164.12]
Sep 6 19:07:40 serveur postfix/submission/smtpd[554657]: disconnect from yunohost.org[80.67.164.12] commands=0/0
Sep 6 19:07:40 serveur postfix/smtpd[555997]: connect from yunohost.org[80.67.164.12]
Sep 6 19:07:40 serveur postfix/smtpd[555997]: lost connection after CONNECT from yunohost.org[80.67.164.12]
Sep 6 19:07:40 serveur postfix/smtpd[555997]: disconnect from yunohost.org[80.67.164.12] commands=0/0
Sep 6 19:07:40 serveur dovecot: imap-login: Disconnected: Connection closed (no auth attempts in 0 secs): user=<>, rip=2001:910:1400:115::12, lip=2a01:e0a:c17:48d0:ca5b:76ff:fe3c:1d2f, TLS handshaking: Connection closed, session=<mtD1/SQ+SLogAQkQFAABFQAAAAAAAAAS>
Sep 6 19:07:40 serveur postfix/smtpd[555997]: connect from yunohost.org[2001:910:1400:115::12]
Sep 6 19:07:40 serveur postfix/submission/smtpd[554657]: connect from yunohost.org[2001:910:1400:115::12]
Sep 6 19:07:40 serveur postfix/submission/smtpd[554657]: lost connection after CONNECT from yunohost.org[2001:910:1400:115::12]
Sep 6 19:07:40 serveur postfix/submission/smtpd[554657]: disconnect from yunohost.org[2001:910:1400:115::12] commands=0/0
Sep 6 19:07:40 serveur postfix/smtpd[555997]: lost connection after CONNECT from yunohost.org[2001:910:1400:115::12]
Sep 6 19:07:40 serveur postfix/smtpd[555997]: disconnect from yunohost.org[2001:910:1400:115::12] commands=0/0
Sep 6 19:07:41 serveur postfix/smtpd[555997]: connect from yunohost.org[80.67.164.12]
Sep 6 19:07:41 serveur postfix/smtpd[555997]: lost connection after CONNECT from yunohost.org[80.67.164.12]
Sep 6 19:07:41 serveur postfix/smtpd[555997]: disconnect from yunohost.org[80.67.164.12] commands=0/0
Sep 6 19:07:41 serveur postfix/smtpd[555997]: connect from yunohost.org[2001:910:1400:115::12]
Sep 6 19:07:41 serveur postfix/smtpd[555997]: lost connection after CONNECT from yunohost.org[2001:910:1400:115::12]
Sep 6 19:07:41 serveur postfix/smtpd[555997]: disconnect from yunohost.org[2001:910:1400:115::12] commands=0/0
Je ne trouve pas ça très parlant, @tituspijean, est-ce que tu vois un indice ?
On remarque ce qu’on sait déjà, que le serveur tente uniquement en IPv6, et ne se rabat pas automatiquement en IPv4.
après un redémarrage de dnsmasq avec sudo systemctl restart dnsmasq, et un renvoi du même mail, voici les logs :
Sep 6 19:19:32 serveur slapd[832]: slap_global_control: unrecognized control: 1.3.6.1.4.1.4203.666.5.16
Sep 6 19:19:32 serveur slapd[832]: slap_global_control: unrecognized control: 1.3.6.1.4.1.4203.666.5.16
Sep 6 19:19:32 serveur systemd[1]: Stopping dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server...
Sep 6 19:19:32 serveur systemd[1]: Reloading postfix@-.service - Postfix Mail Transport Agent (instance -)...
Sep 6 19:19:32 serveur postfix[563277]: Postfix is using backwards-compatible default settings
Sep 6 19:19:32 serveur postfix[563277]: See http://www.postfix.org/COMPATIBILITY_README.html for details
Sep 6 19:19:32 serveur postfix[563277]: To disable backwards compatibility use "postconf compatibility_level=3.6" and "postfix reload"
Sep 6 19:19:32 serveur postfix/postfix-script[563283]: refreshing the Postfix mail system
Sep 6 19:19:32 serveur postfix/master[2051]: reload -- version 3.7.11, configuration /etc/postfix
Sep 6 19:19:32 serveur systemd[1]: Reloaded postfix@-.service - Postfix Mail Transport Agent (instance -).
Sep 6 19:19:32 serveur systemd[1]: Reloading postfix.service - Postfix Mail Transport Agent...
Sep 6 19:19:32 serveur systemd[1]: Reloaded postfix.service - Postfix Mail Transport Agent.
Sep 6 19:19:32 serveur dnsmasq[960887]: sortie sur réception du signal SIGTERM
Sep 6 19:19:32 serveur systemd[1]: dnsmasq.service: Deactivated successfully.
Sep 6 19:19:32 serveur systemd[1]: Stopped dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server.
Sep 6 19:19:32 serveur systemd[1]: dnsmasq.service: Consumed 4min 47.825s CPU time.
Sep 6 19:19:32 serveur systemd[1]: Starting dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server...
Sep 6 19:19:32 serveur dnsmasq[563304]: demarré, version 2.90 (taille de cache 256)
Sep 6 19:19:32 serveur dnsmasq[563304]: options à la compilation : IPv6 GNU-getopt DBus no-UBus i18n IDN2 DHCP DHCPv6 no-Lua TFTP conntrack ipset nftset auth cryptohash DNSSEC loop-detect inotify dumpfile
Sep 6 19:19:32 serveur dnsmasq[563304]: Lecture de /etc/resolv.dnsmasq.conf
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 194.150.168.168#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2a0c:e300::1337#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2a0c:e300::101#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 185.233.100.100#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 194.0.5.3#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 194.242.2.2#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 84.200.69.80#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2a00:5881:8100:1000::3#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 91.239.100.100#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2001:678:8::3#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 89.233.43.71#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 185.233.100.101#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2a07:e340::2#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2a01:3a0:53:53::#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 84.200.70.40#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 45.67.81.23#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 195.160.173.53#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2001:1608:10:25::1c04:b12f#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 89.234.141.66#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2001:67c:28a4::#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2001:1608:10:25::9249:d69b#53
Sep 6 19:19:32 serveur dnsmasq[563304]: utilise le serveur de nom 2a0c:e300::100#53
Sep 6 19:19:32 serveur dnsmasq[563304]: read /etc/hosts - 9 names
Sep 6 19:19:33 serveur systemd[1]: Reloading postfix@-.service - Postfix Mail Transport Agent (instance -)...
Sep 6 19:19:33 serveur postfix[563361]: Postfix is using backwards-compatible default settings
Sep 6 19:19:33 serveur postfix[563361]: See http://www.postfix.org/COMPATIBILITY_README.html for details
Sep 6 19:19:33 serveur postfix[563361]: To disable backwards compatibility use "postconf compatibility_level=3.6" and "postfix reload"
Sep 6 19:19:33 serveur postfix/postfix-script[563367]: refreshing the Postfix mail system
Sep 6 19:19:33 serveur postfix/master[2051]: reload -- version 3.7.11, configuration /etc/postfix
Sep 6 19:19:33 serveur systemd[1]: Reloaded postfix@-.service - Postfix Mail Transport Agent (instance -).
Sep 6 19:19:33 serveur systemd[1]: Reloading postfix.service - Postfix Mail Transport Agent...
Sep 6 19:19:33 serveur systemd[1]: Reloaded postfix.service - Postfix Mail Transport Agent.
Sep 6 19:19:33 serveur systemd[1]: Started dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server.
Sep 6 19:19:53 serveur postfix/submission/smtpd[563556]: connect from unknown[2a01:e0a:c17:0000:0000:0000:0000:0000]
Sep 6 19:19:54 serveur postfix/submission/smtpd[563556]: Anonymous TLS connection established from unknown[2a01:e0a:c17:0000:0000:0000:0000:0000] to serveur.remplacedDomain.fr: TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (3072 bits) server-digest SHA256
Sep 6 19:19:54 serveur postfix/submission/smtpd[563556]: 2B0FAD40953: client=unknown[2a01:e0a:c17:0000:0000:0000:0000:0000], sasl_method=PLAIN, sasl_username=remplacedName
Sep 6 19:19:54 serveur postsrsd[563577]: srs_forward: <remplacedName@remplacedDomain.fr> not rewritten: Domain excluded by policy
Sep 6 19:19:54 serveur postfix/cleanup[563576]: 2B0FAD40953: message-id=<24ef9373-fea7-4883-888c-d3e0e1ff25f9@remplacedDomain.fr>
Sep 6 19:19:54 serveur opendkim[1076]: 2B0FAD40953: DKIM-Signature field added (s=mail, d=remplacedDomain.fr)
Sep 6 19:19:54 serveur postfix/qmgr[563371]: 2B0FAD40953: from=<remplacedName@remplacedDomain.fr>, size=14965, nrcpt=3 (queue active)
Sep 6 19:19:54 serveur dovecot: imap-login: Login: user=<remplacedName>, method=PLAIN, rip=2a01:e0a:c17:0000:0000:0000:0000:0000, lip=2a01:e0a:c17:48d0:ca5b:76ff:fe3c:1d2f, mpid=563582, TLS, session=<d9SvKSU+lM8qAQ4KDBdI0BVFxLs1dSE7>
Sep 6 19:19:54 serveur dovecot: imap(remplacedName)<563582><d9SvKSU+lM8qAQ4KDBdI0BVFxLs1dSE7>: Disconnected: Logged out in=14809 out=637 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
Sep 6 19:19:54 serveur postfix/smtp[563580]: Trusted TLS connection established to gmail-smtp-in.l.google.com[74.125.206.27]:25: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256
Sep 6 19:19:56 serveur postfix/smtp[563583]: Trusted TLS connection established to mx-55162650.mail.eu.retarus.com[94.199.92.130]:25: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256
Sep 6 19:19:57 serveur postfix/smtp[563583]: 2B0FAD40953: to=<adresseDestinataire1@notaires.fr>, relay=mx-55162650.mail.eu.retarus.com[94.199.92.130]:25, delay=3.6, delays=0.16/0.13/2.1/1.2, dsn=2.0.0, status=sent (250 2.0.0 Ok: processed as 4cK0Mc4G6yz10MG)
Sep 6 19:19:57 serveur postfix/smtp[563583]: 2B0FAD40953: to=<adresseDestinataire2@notaires.fr>, relay=mx-55162650.mail.eu.retarus.com[94.199.92.130]:25, delay=3.6, delays=0.16/0.13/2.1/1.2, dsn=2.0.0, status=sent (250 2.0.0 Ok: processed as 4cK0Mc4G6yz10MG)
Sep 6 19:19:57 serveur postfix/qmgr[563371]: 2B0FAD40953: removed
Sep 6 19:19:59 serveur postfix/submission/smtpd[563556]: disconnect from unknown[2a01:e0a:c17:0000:0000:0000:0000:0000] ehlo=2 starttls=1 auth=1 mail=1 rcpt=3 data=1 quit=1 commands=10