is it possible that the alerts are going to a different email folder than you expect? In my case, the alerts go to a clutter folder within outlook 365.
Do you know that the server has stopped sending the alerts or are you not receiving them? Do you see any issues in Config (like reverting to old settings) or does everything look fine when you check? Have you checked the Tableau Server logs to verify? You'll need to set the clustercontroller to DEBUG to see detail on the emails being sent out (including any potential error messages). You should see things like "com.tableausoftware.cluster.notification.QueuedEmailNotifier" at the start of the process.
To Set the Cluster Controller Process to DEBUG, please follow the below steps:
- Stop the Tableau Server - https://onlinehelp.tableau.com/current/server/en-us/tabadmin_cmd.htm#stop
- In a command prompt on the Tableau Server, run the command "Tabadmin set clustercontroller.log.level debug" (no quotes) and press enter
- Start the Tableau Server after the confirmation message
- Optional - Stop the Tableau Server, Change logging levels back to WARN, Start the Tableau Server
Logs are a bit difficult to read so if you get stuck, it might be best to open a support case.
Hope this helps!