I am facing the following problem.
We have the requirement that
Unknown customers should not be able to register in the portal.
However, these customers should be able to send an email,
which should then be processed and a technical user should be used as the creator,
so that further processing in Jira Service Management is possible.
Actually this emails are only in the Log for the project mail address.
An Workaround will be that when this happend an alert is sended,
I haven't found a way to do this here or on the internet
.