If you forge the from: header in a mail send to Jira to match the mail address of a registered user, Jira will create an issue and set the reporter to the registered user, even though the mail header says:
Authentication-Results: mx.google.com; spf=fail (google.com: domain of <email address> does not designate <IP address> as permitted sender) [...]
Is there a way to set the reporter for an issue created from a mail that failed basic SPF checks to "unknown"?