Overview

Currently, to send email alerts when your pipeline run completes, you have to set up an SMTP server on a long-running Dataproc cluster, and use that for your pipeline. You might consider using the Sendgrid post-action plugin to send an email at the end of a pipeline run. You can configure it to send an email when the pipeline completes, succeeds or fails. The plugin uses the Sendgrid service to send emails, and requires you to sign up for a Sendgrid account. You can download this plugin here: 

https://github.com/data-integrations/sendgrid/blob/develop/docs/EmailBySendgrid-postaction.md