Email on Zenoss
E-mail Server configuration
Zenoss will use the local e-mail server by default by connecting to port 25 on localhost. This does not work with some configurations (such as SSMTP) that don't listen on port 25. To change this setting, head over to the Advanced tab, which should default to Settings on the Right. Fill in the correct values the SMTP server, port, and username and password if Applicable. If you're running multiple instances of Zenoss you might also want to set the Instance Identifier, otherwise leave that as the default. If your SMTP server supports it, you can enable TLS for a bit more security. Click Save at the bottom when you're done to save your settings.
Testing your Configuration
Zenoss has a built in e-mail testing system. From the Advanced tab, select Users, and click (test) next to any user with an e-mail account.
Extending E-mail notification
Zenoss is a bit limited here because each user can have only one e-mail address. You may wish to set up an alias such as <username-announce>@yourdomain.tld on your mail server that will hit both your e-mail inbox and your phone via your provider's e-mail to SMS gateway. You can also set up an e-mail to SMS gateway to send SMS directly to phones which would circumvent a larger outage.