Für mich sieht es fast so aus, als wenn es nicht ein Benachrichtigungsproblem ist, sondern eher ein Eventproblem.
Das eventuell alle Events doppelt erkannt werden und somit auch die Benachrichtigungen doppelt sind.
Ich habe eine E-Mail-Adresse eingegeben, die noch nicht im System ist. Woher soll er den 2. Kontakt nehmen?
Hier mal ein Event aus ~/var/log/notify.log
2026-08-13 08:34:34,935 [20] [cmk.base.notify] Got raw notification (Luna;NTP Time) context with 93 variables
2026-08-13 08:34:34,935 [15] [cmk.base.notify] Global rule ‘Benachrichtigungen für SPAM’…
2026-08-13 08:34:34,935 [15] [cmk.base.notify] → does not match: The host’s name ‘Luna’ is not on the list of allowed hosts (Exchange2019)
2026-08-13 08:34:34,936 [15] [cmk.base.notify] Global rule ‘Benachrichtigungen für Temperaturen’…
2026-08-13 08:34:34,936 [15] [cmk.base.notify] → does not match: The service labels {‘service’: ‘temperatur’} did not match {}
2026-08-13 08:34:34,936 [15] [cmk.base.notify] Global rule ‘Notify all contacts of a host/service via HTML email’…
2026-08-13 08:34:34,936 [15] [cmk.base.notify] → does not match: This rule is disabled
2026-08-13 08:34:34,936 [15] [cmk.base.notify] Global rule ‘Host Status’…
2026-08-13 08:34:34,936 [15] [cmk.base.notify] → does not match: This is a service notification, but the rule just matches host events
2026-08-13 08:34:34,936 [20] [cmk.base.notify] No rule matched, notifying fallback contacts
2026-08-13 08:34:34,936 [20] [cmk.base.notify] Sending email to [‘Hans@Wurst.de’]
2026-08-13 08:34:34,936 [20] [cmk.events.log_to_history] sending command LOG;SERVICE NOTIFICATION: ``mailto:Hans@Wurst.de``;Luna;NTP Time;WARNING;asciimail;Offset: 935.3520 ms (warn/crit at 8>
2026-08-13 08:34:34,937 [20] [cmk.base.notify] executing /omd/sites/checkmk/share/check_mk/notifications/asciimail
2026-08-13 08:34:35,634 [20] [cmk.base.notify] Output: Spooled mail to local mail transmission agent
2026-08-13 08:34:35,747 [20] [cmk.events.log_to_history] sending command LOG;SERVICE NOTIFICATION RESULT: ``mailto:Hans@Wurst.de``;Luna;NTP Time;OK;asciimail;Spooled mail to local mail transm>
2026-08-13 08:34:37,254 [20] [cmk.base.notify] ----------------------------------------------------------------------
2026-08-13 08:34:37,254 [20] [cmk.base.notify] Got raw notification (Luna;NTP Time) context with 93 variables
2026-08-13 08:34:37,254 [15] [cmk.base.notify] Global rule ‘Benachrichtigungen für SPAM’…
2026-08-13 08:34:37,254 [15] [cmk.base.notify] → does not match: The host’s name ‘Luna’ is not on the list of allowed hosts (Exchange2019)
2026-08-13 08:34:37,254 [15] [cmk.base.notify] Global rule ‘Benachrichtigungen für Temperaturen’…
2026-08-13 08:34:37,254 [15] [cmk.base.notify] → does not match: The service labels {‘service’: ‘temperatur’} did not match {}
2026-08-13 08:34:37,254 [15] [cmk.base.notify] Global rule ‘Notify all contacts of a host/service via HTML email’…
2026-08-13 08:34:37,254 [15] [cmk.base.notify] → does not match: This rule is disabled
2026-08-13 08:34:37,255 [15] [cmk.base.notify] Global rule ‘Host Status’…
2026-08-13 08:34:37,255 [15] [cmk.base.notify] → does not match: This is a service notification, but the rule just matches host events
2026-08-13 08:34:37,255 [20] [cmk.base.notify] No rule matched, notifying fallback contacts
2026-08-13 08:34:37,255 [20] [cmk.base.notify] Sending email to [‘Hans@Wurst.de’]
2026-08-13 08:34:37,255 [20] [cmk.events.log_to_history] sending command LOG;SERVICE NOTIFICATION: ``mailto:Hans@Wurst.de``;Luna;NTP Time;WARNING;asciimail;Offset: 935.3520 ms (warn/crit at 8>
2026-08-13 08:34:37,255 [20] [cmk.base.notify] executing /omd/sites/checkmk/share/check_mk/notifications/asciimail
2026-08-13 08:34:38,028 [20] [cmk.base.notify] Output: Spooled mail to local mail transmission agent
2026-08-13 08:34:38,117 [20] [cmk.events.log_to_history] sending command LOG;SERVICE NOTIFICATION RESULT: ``mailto:Hans@Wurst.de``;Luna;NTP Time;OK;asciimail;Spooled mail to local mail transm>