Under Settings, then Notifications. Email works with no setup; Slack and PagerDuty need connecting first.
Alerts
Where Screenly tells you a screen went offline: email, Slack, or PagerDuty.
In this section
What Screenly notifies on
Two events, three destinations. What is covered, what is deliberately not, and how to keep alerts worth reading.
Slack
One Slack connection, two uses: offline alerts posted to a channel, and apps that read from Slack.
PagerDuty
Raise a PagerDuty incident when a screen goes offline. Creating the service, and deciding which screens deserve it.