I’m using checkmk-raw 1.6.0p13 and it was a fresh install, the problem that I’m facing occurred from the beginning, so it wasn’t caused by any update. I’m running check_mk on CentOS 7. Logs didn’t helped me at all. Below I’m posting what I get in notification mail:
Only check_mk with its additional software was installed on that system, from additional that could be useful I can say, that web interface is running with a certificate signed by a company.
I would be very thankful for any help (re-installation is not possible).