In addition to mcapra's post, I noticed that the notification type the your email screenshot is a RECOVERY notification. I don't think these types of notifications are enabled be default or, these users haven't chosen to be notified on RECOVERY.
You can check by going to:
Contact view config.jpg
When you click the 'view config' button you'll see all the notification options that are enabled for each user. Use the following to verify these contacts are to receive notifications on recoveries:
host_notification_options :
This directive is used to determine when notifications for the host should be sent out. Valid options are a combination of one or more of the following:
d = send notifications on a DOWN state,
u = send notifications on an UNREACHABLE state,
r = send notifications on recoveries (OK state),
f = send notifications when the host starts and stops flapping, and
s = send notifications when scheduled downtime starts and ends.
If you do not specify any notification options, Nagios will assume that you want notifications to be sent out for all possible states.
Example: If you specify d,r in this field, notifications will only be sent out when the host goes DOWN and when it recovers from a DOWN state.
service_notification_options
This directive is used to determine when notifications for the service should be sent out. Valid options are a combination of one or more of the following:
w = send notifications on a WARNING state,
u = send notifications on an UNKNOWN state,
c = send notifications on a CRITICAL state,
r = send notifications on recoveries (OK state),
f = send notifications when the service starts and stops flapping, and
s = send notifications when scheduled downtime starts and ends.
If you do not specify any notification options, Nagios will assume that you want notifications to be sent out for all possible states.
Example: If you specify w,r in this field, notifications will only be sent out when the service goes into a WARNING state and when it recovers from a WARNING state.
