JIRA Service Desk NOT creating tickets for emails sent to a mailing list

This bug was raised in response to an answers ticket

https://answers.atlassian.com/questions/10403992/jira-service-desk-not-creating-tickets-for-emails-sent-to-a-mailing-list

Setup ServiceDesk1 email settings to read from email test1@example.com over POP
Send email to test1@example.com
Ticket Created in ServiceDesk1 (OK)
test1@example.com is part of the mailing list list1@example.com
Send an email to list1@example.com
Email is properly received to the Inbox of test1@example.com (OK)
Email then disappears from the Inbox of test1@example.com (OK: since JIRA Service Desk retrieves the whole inbox in POP mode)
Ticket NOT Created in ServiceDesk1 (NOK!)