Disable individual event rule email aggregation
If event rule aggregation is enabled system wide, you can disable event rule aggregation for individual event rules by setting the count to 0.
To disable email messages for the event rule NPSNoLongerOnline,
enter:
nzevent modify -u admin -pw password -name NPSNoLongerOnline -on
yes -dst jdoe@company.com -eventAggrCount 1