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To avoid large amounts of emails being sent for the same issue, there is a cool-down period of 30 minutes during which email sending is suspended. During this time, you will only receive one email for a specific problem issue in a specific stream, even if your stream has multiple collectors with the same issue occurs multiple times.  

For information on streams, see Streams.

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• Click Delete  to delete a notification group. The delete option permanently removes the notification group and removes the group from any streams. 

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Using Stream Notification

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