For these users who don't need all of the details, look at service_notifications_enabled as the contact config option. This will only give them host notifications. You can do ALL kinds of things to fine tune your notifications with Nagios, so don't waste them if people don't need to get them, otherwise they'll just get filtered into a mailbox that no one ever reads.
http://nagios.sourceforge.net/docs/3_0/objectdefinitions.html#contact