Multiple emails with delay interval

Hi,

I have notifications set for several people to get emails when services go down.
User1 is set to no delay interval and no repeat interval.
User1 receives the email as expected every time.

User2 is set to 00:05:00 delay interval and no repeat interval.
User2 receives an email at some random point in the future after 5 minutes.
This is fine as mail servers sometimes take time to get emails back and forth.

Probe interval is 20 sec
Probe timeout is 10 sec
Probe down is 3

If a service goes down and the first email is received by User2 20 minutes later, then that user receives 20 consecutive emails. Is this normal?

The preferred behavior in my case is to only receive the email 1 time, even if it’s 20 minutes later instead of the expected 5 minutes.

Thanks.