When we install the vm engine, in the configuration process we are asked to give an smtp server and email addresses for notification but then nothing. 

When we looked to the event notification configuration we found this file ovirt-engine-notifier.conf and we thought that the first configuration was there but since the notification service was disabled notifications were not working, but No, there was no configuration on that file we had to modify it and now notifications are working. 

The question is : is the first smtp configuration used ? If yes, when? Can we test it ? And if we want to modify it, where the configuration is stored ?