Global Disabling of Alert Delivery
The Alert Settings section of the Settings page (tab) is where global alert delivery settings are configured.
Enable/Disable Alert Delivery
If you select the Alert Settings header itself, you'll see an option to enable/disable all alert delivery for your entire account. By default, alert notifications are delivered per your Alert Rules and Escalation Chains. Disabling alert delivery will result in no alerts being routed, alerts will only be displayed in your account.