Nagios Support Forum

hello all,
I am new user of nagios and in this forum.
I installed nagios for the first time, and I see on the nagios served SMTP does not work properly! but in reality all emails going well! it shows me "this service has 1 comment associated with it" AND "this service is flapping betweens states", but the service is running correctly!
Do you have any idea about this anomaly?
thank you

What are you checking with this service? It is possible your warning and okay or critical thresholds are too close together so when it changes the smallest bit, it changes state.