Notifications only working for one specific Host

Hello Everyone
I have a problem with my Icinga2 notifications. I am using ssmtp and bsd-mailx. The strange thing is it works for one host but only for this one. For the other hosts and services it doesnt work and my hosts are configured identically. It uses the same command and the same script i dont know where else to search.

icinga2 - The Icinga 2 network monitoring daemon (version: r2.13.6-1)
Host that works:

object Host “UBUICI2” {
import “generic-host”
address = “192.168.XXX.XXX”
check_command = “hostalive”
enable_notifications = true
check_interval = 1m
zone = “master”
command_endpoint = “UBUICI2”
vars.notification[“mail”] = {
groups = [ “icingaadmins” ]
users = [ “icingaadmin” ]

}
vars.functions = [“icinga”,“myservers”]
}

Host that doesnt work:

object Host “WINSQL” {
import “generic-host”
address = “192.168.XXX.XXX”
vars.user = “Administrator”
vars.password = “******”
check_command = “hostalive”
enable_notifications = true
check_interval = 1m
zone = “master”
command_endpoint = “UBUICI2”
vars.notification[“mail”] = {
groups = [ “icingaadmins” ]
users = [ “icingaadmin” ]

}
vars.functions = [“myservers”]
}
If you need some other confs please tell me.
Best regards xl3von