Email notifications in Cloudstack

[SviridoffA]

Hello everyone! Guys, I need your help. I haven’t been able to find any information regarding email notifications in CloudStack. I’ve configured the SMTP parameters for my mail server in the global settings for project alerts and quotas. However, I haven’t received any notifications yet, and I haven’t even seen any connection attempts on the mail server. And I don’t see anything related in the management server logs. But for sure, the alerts did occur. I also haven’t found any tools in CloudStack for testing mail settings. Maybe something needs to be installed, or perhaps someone could share a link on how to get email notifications working?

[DaanHoogland]

I don't think this should be a problem @SviridoffA . Did you check any routes/firewalls in the system(s). When no connection attempts go out, is that on the MS itself or on a remote server?

some configurations jump out;

• publish.alert.events
• publish.resource.state.events
  and maybe
• *.smtp.useStartTLS

you can search smtp and mail in the settings tab to see if anything sticks out that you might have forgotten.

@JoaoJandre , do you happen to know what else could have gone wrong?

[SviridoffA]

Hi @DaanHoogland ! Thanks for your reply. I decided to stop the agent on one of the KVM nodes to ensure an alert would be generated. This finally let me find a Java exception in the MS logs; it stated that an unsuccessful TLS handshake occurred when attempting to send a message. I checked my mail server and found logs indicating an unsupported TLS version. I discovered that my server only supports TLSv1.2 and TLSv1.3. Luckily, CloudStack supports 1.2. I set the global settings for each notification type to TLSv1.2. After that, everything works as expected.