Comment Handler Is Unable to Identify Issue
The following error appears in the logs:
Could not find a corresponding issue to comment and Create Issue Handler is not selected
A comment mail handler has been configured. When processing the emails, JIRA examines the email subject and the in-reply-to message for an existing issue reference to determine on which issue to comment. If the email does not have a valid issue id in the subject, and the email is not an in-reply-to a JIRA notification, the mail handler is not able to identify which issue to comment, and the email is discarded.
The recommendation is to configure the forward emails property so those messages that cannot be handled by JIRA are forwarded to another email account.