[otrs] Problem duplicated Notification for any action

Please, help my with this problem. I sent this problem, before, but not have a responses. I clearing the problem: For any action, otrs send two Notification identical (duplicated) to users or client. For example i create a tk from my queue and i recive this mails subject: Re: [Ticket#200607261000015] Notificacion de Nuevo Ticket! (General) Re: [Ticket#200607261000015] Notificacion de Nuevo Ticket! (General) I view logs from mail server and Real otrs sent two mails. I find the problem, but not view. Thanks. Gustavo