I got Munin to notify me with email if certain values goes above my thresholds. This works very well and I am happy with it. However, there is a small glitch. If any of my values is in critical or warning state and Munin sends me notification about it, then on the next Munin update run I again receive the same notification, regardless that there is no change in the status. I found out that Munin run updates by default every 5 minutes.
Is there a way to make/force Munin to send single emails only on status change (i.e. first email for critical values, second for back to normal, not critical-critical-...-critical-normal)?