sending a message about the change of status of unregistered

[kadavr]

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Good all the time of day. The question is - there are many users who do not register, leave a request with the email address. Is it possible to send messages to users by changing the status of the ticket? Or just where that is the settings that I did not notice?

P.S. Sorry if the question has already been raised. I do not speak English very well, and for the text-thanks Google translator

[Klemen]

The notification is only sent when a reply is added to the ticket, not when status changes.