Okay Thank you. I checked that SELinux is disabled could this cause the Problem?
Hi again.
If SELinux is disabled, this does not cause the problem.
Sorry, I am out of ideas. At this point, it may be helpful to check on the Mattermost side (if possible) what is happening when you manually send a notification from icingaweb2.
- Is the request even arriving?
- What’s happening?
Greetings.
okay thank you. I will check what I can do with mattermost. If I run the command the notificaiton arrives in mattermost. Its just confusing because I cant send a manual notification from icinga web interface.
Hey there 
I would like to ask you to mark an answer as the solution, if it resolves your topic.
okay I will but unfortunately there is no solution