[RESOLU] Fail2ban WARNING Command sshd-ddos et postfix-sasl chaque minute

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Bonjour tout le monde!

Je rencontre un “problème” dans les logs de fail2ban. Je précise que je ne suis pas un grand spécialiste, tout au plus un utilisateur avisé.

Mon serveur YunoHost

Matériel: HP Envy All in One
Version de YunoHost: 4.2.5.2 (stable)
Programmes installés: NextCloud 20.0.8~ynh1 + Transmission 1.0~ynh4
J’ai accès à mon serveur: En SSH + webadmin + direct avec un clavier-écran
Êtes-vous dans un contexte particulier ou avez-vous effectué des modifications particulières sur votre instance ?: Oui et non
J’ai suivi les recommandations de sécurité de la documentation Yunohost (changement du port SSH, etc.).

Description du problème

Lors de la visualisation des logs de fail2an, je vois des WARNING Command toutes les minutes. Comme je ne comprends pas bien de quoi il s’agit, je me permets de vous solliciter.
J’ai vu dans une autre discussion que des logs de fail2ban pouvaient être provoqués par Monitorix, que j’ai désinstallé avant de relancer fail2ban. Et j’ai donc ces logs:

2021-06-02 10:14:46,975 fail2ban.server         [618]: INFO    Exiting Fail2ban
2021-06-02 10:14:47,218 fail2ban.server         [28231]: INFO    --------------------------------------------------
2021-06-02 10:14:47,218 fail2ban.server         [28231]: INFO    Starting Fail2ban v0.10.2
2021-06-02 10:14:47,248 fail2ban.database       [28231]: INFO    Connected to fail2ban persistent database '/var/lib/fail2ban/fail2ban.sqlite3'
2021-06-02 10:14:47,309 fail2ban.jail           [28231]: INFO    Creating new jail 'sshd'
2021-06-02 10:14:47,359 fail2ban.jail           [28231]: INFO    Jail 'sshd' uses pyinotify {}
2021-06-02 10:14:47,361 fail2ban.jail           [28231]: INFO    Initiated 'pyinotify' backend
2021-06-02 10:14:47,362 fail2ban.filter         [28231]: INFO      maxLines: 1
2021-06-02 10:14:47,379 fail2ban.server         [28231]: INFO    Jail sshd is not a JournalFilter instance
2021-06-02 10:14:47,380 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/auth.log' (pos = 311427, hash = e2eb84d2710961df9bc1799d1ecc436b9d8fec48)
2021-06-02 10:14:47,381 fail2ban.filter         [28231]: INFO      encoding: UTF-8
2021-06-02 10:14:47,381 fail2ban.filter         [28231]: INFO      maxRetry: 10
2021-06-02 10:14:47,382 fail2ban.filter         [28231]: INFO      findtime: 600
2021-06-02 10:14:47,382 fail2ban.actions        [28231]: INFO      banTime: 600
2021-06-02 10:14:47,383 fail2ban.jail           [28231]: INFO    Creating new jail 'nginx-http-auth'
2021-06-02 10:14:47,383 fail2ban.jail           [28231]: INFO    Jail 'nginx-http-auth' uses pyinotify {}
2021-06-02 10:14:47,386 fail2ban.jail           [28231]: INFO    Initiated 'pyinotify' backend
2021-06-02 10:14:47,388 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/error.log' (pos = 10564, hash = 1c455b35ba5ffbc44078766b22d6ad6e024ec324)
2021-06-02 10:14:47,389 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/funkwhale.commeuneforet.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,390 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/nextcloud.oinska.internet-box.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,390 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.oinska.internet-box.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,391 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/oinska.internet-box.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,391 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.funkwhale.commeuneforet.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,392 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.oinska.nohost.me-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,392 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.nextcloud.oinska.internet-box.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,393 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/oinska.nohost.me-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,394 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/localhost-nginx_status_monitorix.lan-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,395 fail2ban.filter         [28231]: INFO      encoding: UTF-8
2021-06-02 10:14:47,395 fail2ban.filter         [28231]: INFO      maxRetry: 10
2021-06-02 10:14:47,395 fail2ban.filter         [28231]: INFO      findtime: 600
2021-06-02 10:14:47,395 fail2ban.actions        [28231]: INFO      banTime: 600
2021-06-02 10:14:47,396 fail2ban.jail           [28231]: INFO    Creating new jail 'postfix'
2021-06-02 10:14:47,397 fail2ban.jail           [28231]: INFO    Jail 'postfix' uses pyinotify {}
2021-06-02 10:14:47,399 fail2ban.jail           [28231]: INFO    Initiated 'pyinotify' backend
2021-06-02 10:14:47,407 fail2ban.server         [28231]: INFO    Jail postfix is not a JournalFilter instance
2021-06-02 10:14:47,407 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/mail.log' (pos = 275534, hash = 7ef95f92c0d55e4e0cad1d16878f63d7da9b3ede)
2021-06-02 10:14:47,408 fail2ban.filter         [28231]: INFO      encoding: UTF-8
2021-06-02 10:14:47,408 fail2ban.filter         [28231]: INFO      maxRetry: 10
2021-06-02 10:14:47,408 fail2ban.filter         [28231]: INFO      findtime: 600
2021-06-02 10:14:47,408 fail2ban.actions        [28231]: INFO      banTime: 600
2021-06-02 10:14:47,409 fail2ban.jail           [28231]: INFO    Creating new jail 'dovecot'
2021-06-02 10:14:47,409 fail2ban.jail           [28231]: INFO    Jail 'dovecot' uses pyinotify {}
2021-06-02 10:14:47,412 fail2ban.jail           [28231]: INFO    Initiated 'pyinotify' backend
2021-06-02 10:14:47,418 fail2ban.datedetector   [28231]: INFO      date pattern `''`: `{^LN-BEG}TAI64N`
2021-06-02 10:14:47,418 fail2ban.server         [28231]: INFO    Jail dovecot is not a JournalFilter instance
2021-06-02 10:14:47,418 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/mail.log' (pos = 275534, hash = 7ef95f92c0d55e4e0cad1d16878f63d7da9b3ede)
2021-06-02 10:14:47,419 fail2ban.filter         [28231]: INFO      encoding: UTF-8
2021-06-02 10:14:47,419 fail2ban.filter         [28231]: INFO      maxRetry: 10
2021-06-02 10:14:47,419 fail2ban.filter         [28231]: INFO      findtime: 600
2021-06-02 10:14:47,420 fail2ban.actions        [28231]: INFO      banTime: 600
2021-06-02 10:14:47,420 fail2ban.jail           [28231]: INFO    Creating new jail 'recidive'
2021-06-02 10:14:47,421 fail2ban.jail           [28231]: INFO    Jail 'recidive' uses pyinotify {}
2021-06-02 10:14:47,423 fail2ban.jail           [28231]: INFO    Initiated 'pyinotify' backend
2021-06-02 10:14:47,425 fail2ban.server         [28231]: INFO    Jail recidive is not a JournalFilter instance
2021-06-02 10:14:47,426 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/fail2ban.log' (pos = 3012765, hash = 95ede000ef365b400a8a7a01b080af0e7a5d76af)
2021-06-02 10:14:47,427 fail2ban.filter         [28231]: INFO      encoding: UTF-8
2021-06-02 10:14:47,427 fail2ban.filter         [28231]: INFO      maxRetry: 10
2021-06-02 10:14:47,428 fail2ban.filter         [28231]: INFO      findtime: 86400
2021-06-02 10:14:47,428 fail2ban.actions        [28231]: INFO      banTime: 604800
2021-06-02 10:14:47,429 fail2ban.jail           [28231]: INFO    Creating new jail 'pam-generic'
2021-06-02 10:14:47,429 fail2ban.jail           [28231]: INFO    Jail 'pam-generic' uses pyinotify {}
2021-06-02 10:14:47,431 fail2ban.jail           [28231]: INFO    Initiated 'pyinotify' backend
2021-06-02 10:14:47,436 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/auth.log' (pos = 311427, hash = e2eb84d2710961df9bc1799d1ecc436b9d8fec48)
2021-06-02 10:14:47,437 fail2ban.filter         [28231]: INFO      encoding: UTF-8
2021-06-02 10:14:47,437 fail2ban.filter         [28231]: INFO      maxRetry: 10
2021-06-02 10:14:47,437 fail2ban.filter         [28231]: INFO      findtime: 600
2021-06-02 10:14:47,437 fail2ban.actions        [28231]: INFO      banTime: 600
2021-06-02 10:14:47,438 fail2ban.jail           [28231]: INFO    Creating new jail 'nextcloud'
2021-06-02 10:14:47,438 fail2ban.jail           [28231]: INFO    Jail 'nextcloud' uses pyinotify {}
2021-06-02 10:14:47,441 fail2ban.jail           [28231]: INFO    Initiated 'pyinotify' backend
2021-06-02 10:14:47,443 fail2ban.filter         [28231]: INFO    Added logfile: '/home/yunohost.app/nextcloud/data/nextcloud.log' (pos = 5512504, hash = d31e9c27f76acba9c78f7d98449eca3c5b60143f)
2021-06-02 10:14:47,443 fail2ban.filter         [28231]: INFO      encoding: UTF-8
2021-06-02 10:14:47,443 fail2ban.filter         [28231]: INFO      maxRetry: 5
2021-06-02 10:14:47,443 fail2ban.filter         [28231]: INFO      findtime: 600
2021-06-02 10:14:47,444 fail2ban.actions        [28231]: INFO      banTime: 600
2021-06-02 10:14:47,444 fail2ban.jail           [28231]: INFO    Creating new jail 'yunohost'
2021-06-02 10:14:47,445 fail2ban.jail           [28231]: INFO    Jail 'yunohost' uses pyinotify {}
2021-06-02 10:14:47,447 fail2ban.jail           [28231]: INFO    Initiated 'pyinotify' backend
2021-06-02 10:14:47,449 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/error.log' (pos = 10564, hash = 1c455b35ba5ffbc44078766b22d6ad6e024ec324)
2021-06-02 10:14:47,450 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/funkwhale.commeuneforet.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,450 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/nextcloud.oinska.internet-box.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,451 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.oinska.internet-box.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,451 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/oinska.internet-box.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,452 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.funkwhale.commeuneforet.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,452 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.oinska.nohost.me-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,453 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.nextcloud.oinska.internet-box.ch-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,454 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/oinska.nohost.me-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,454 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/localhost-nginx_status_monitorix.lan-error.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,455 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/localhost-nginx_status_monitorix.lan-access.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,456 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/access.log' (pos = 51773, hash = 7ffb4fc1fa269ea7f8c74e379d4ebf0b0cc05b01)
2021-06-02 10:14:47,475 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/funkwhale.commeuneforet.ch-access.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,476 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.funkwhale.commeuneforet.ch-access.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,477 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.oinska.internet-box.ch-access.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,478 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.nextcloud.oinska.internet-box.ch-access.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,479 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/xmpp-upload.oinska.nohost.me-access.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,480 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/oinska.internet-box.ch-access.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,481 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/nextcloud.oinska.internet-box.ch-access.log' (pos = 0, hash = da39a3ee5e6b4b0d3255bfef95601890afd80709)
2021-06-02 10:14:47,482 fail2ban.filter         [28231]: INFO    Added logfile: '/var/log/nginx/oinska.nohost.me-access.log' (pos = 430440, hash = 5d25d7e3e558284d965133c4f696a84bc04bc3b5)
2021-06-02 10:14:47,483 fail2ban.filter         [28231]: INFO      encoding: UTF-8
2021-06-02 10:14:47,483 fail2ban.filter         [28231]: INFO      maxRetry: 10
2021-06-02 10:14:47,483 fail2ban.filter         [28231]: INFO      findtime: 600
2021-06-02 10:14:47,483 fail2ban.actions        [28231]: INFO      banTime: 600
2021-06-02 10:14:47,485 fail2ban.jail           [28231]: INFO    Jail 'sshd' started
2021-06-02 10:14:47,486 fail2ban.jail           [28231]: INFO    Jail 'nginx-http-auth' started
2021-06-02 10:14:47,487 fail2ban.jail           [28231]: INFO    Jail 'postfix' started
2021-06-02 10:14:47,488 fail2ban.jail           [28231]: INFO    Jail 'dovecot' started
2021-06-02 10:14:47,489 fail2ban.jail           [28231]: INFO    Jail 'recidive' started
2021-06-02 10:14:47,497 fail2ban.jail           [28231]: INFO    Jail 'pam-generic' started
2021-06-02 10:14:47,498 fail2ban.jail           [28231]: INFO    Jail 'nextcloud' started
2021-06-02 10:14:47,499 fail2ban.jail           [28231]: INFO    Jail 'yunohost' started

Puis immédiatement après, je vois apparaître ces logs:

2021-06-02 10:15:01,482 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:15:01,708 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:16:01,631 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:16:01,855 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:17:00,787 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:17:01,008 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:18:00,922 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:18:01,146 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:19:01,067 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:19:01,288 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:20:01,211 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:20:01,437 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:21:01,352 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:21:01,577 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:22:01,501 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:22:01,726 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:23:01,657 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:23:01,881 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:24:00,817 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:24:01,043 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:25:00,957 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:25:01,184 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:26:01,102 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:26:01,324 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:27:01,245 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:27:01,470 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')
2021-06-02 10:28:01,392 fail2ban.transmitter    [28231]: WARNING Command ['status', 'postfix-sasl'] has failed. Received UnknownJailException('postfix-sasl')
2021-06-02 10:28:01,620 fail2ban.transmitter    [28231]: WARNING Command ['status', 'sshd-ddos'] has failed. Received UnknownJailException('sshd-ddos')

Suis-je en train de me faire pirater?
Merci pour vos avis et votre aide!

2

Avez-vous installé une application pour les mails ? Ça a l’air d’être le système qui essaye d’envoyer des messages mais n’y arrive pas. Bon, en fait je suis pas super calé, je peux me tromper, mais essayez d’installer horde ou roundcube ou autre client de mail.

3

Salut!
Merci pour ton message et pour la piste!

J’ai le module mail dans NextCloud. Mais j’avoue qu’il n’a jamais fonctionné correctement… A vrais dire, les mails ne m’intéressent pas beaucoup.
Je viens de faire quelques essais. Avec mon compte qui regroupe mon user@, root@, admin@, webmaster@ et postmaster@ je ne rencontre aucun problème. Je peux envoyer et recevoir des mails depuis Mail dans NextCloud et depuis mon client Thunderbird.
Par contre, impossible de faire fonctionner les mails pour un autre compte utilisateur… J’ai essayé avec un compte existant et un compte que j’ai créé pour l’occasion, impossible d’envoyer le moindre mail…

Donc tu as peut-être vu juste du premier coup! Chapeau!

Ce n’est pas une question de permissions car les utilisateurs ont les droits sur Mail avec un quota à 1000M, je ne comprend pas d’où peut venir le problème… Je fais quelques recherches.

Encore merci et si tu as des pistes, n’hésite pas!

A bientôt!

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Visiblement, mon problème vient bien du serveur mail. Mais je ne suis pas calé dans ce domaine, donc je tâtonne… J’ai eu des problèmes car certains mails ont été créé avec des majuscule et/ou des tiret (-). Ce qui n’est normalement pas permis.
J’ai encore un compte à paramétrer.
Je reviens vers vous dès que j’ai des nouvelles.

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Bonjour!

J’ai finalement trouvé le responsable! C’était effectivement Monitorix.

Même en l’ayant désinstallé via l’interface d’administration web, il continuait à tourner. Je l’ai donc réinstallé via l’interface web puis désinstallé à nouveau via un terminal en SSH, et là, tout est rentré dans l’ordre!

En espérant que ça puisse aider les suivants!

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