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On this screen you'll find the email address used for the project, projectkey@su-jsm.atlassian.net
Click on the
Next, click on the View Logs link to view the log
Most logs will not have any errors and will show New Requests and New Comments. At times you may see errors
We have found errors due to how forms are sending Reporter information.
Atlassian has a more detailed page about the log and a list of processing errors: https://support.atlassian.com/jira-service-management-cloud/docs/about-email-logs-in-jira-service-management/