Problem with multiple line into Alert

[patrickmann]

You need to set up an aggregation.
Here’s a thread that looks like the same issue:

Aggregating Events for Notification

Hello, I am try to send email alerts when a Stream has events. I want to check the stream every 10 minutes, and if there were any events at all during the last 10 minutes, then send an email with a list of those events. From the settings shown below, I thought I had it setup correctly, however it is not working as intended. Whenever there is an Event (even milliseconds apart), it generates a notification for every event. I want it to only generate a notification up to every 10 minutes, and t…