Alert settings now work in two layers.
Account-wide master switch — turn it off and every alert stops, regardless of channel. One toggle to go quiet during vacations or maintenance windows.
Per-domain channels — with the master on, each domain can enable email and Slack independently. Keep Slack pings for your critical domain and email-only for the rest.
Previously it could be unclear how far a disabled alert reached. Now there is one rule: the master controls everything, domains control their channels.