I have a publicly accessible JSD instance and we have both internal and external customers. Internal customers are registered through LDAP and external customers accounts are created manually.
There will be cases when an external user decides to send an email and open a ticket from their personal email account and ticket will never be created because the account is never registered.
I would like to send an email out to those who do that so they will know that the ticket has not been created and they need to use a registered email address. How can I do this?