[otrs] Allow only known clients

Hi, list: I'm currently testing OTRS and, of course, I'm getting some issues. Due to spam I'd want to process only ticket requests coming from known clients' e-mail addressess, but I don't see how to filter this out. An affordable approach would be to do the same I'm already doing on SPAM-tagged messages: move them to the "Junk" queue and then delete. Is this possible to be done on all unknown e-mail addresses (both users+clientes) on the "From" field? What would be the best approach? -- Jesús M. Navarro Jefe de Sistemas y Soporte Ándago Ingeniería - www.andago.com Teléfono: +34 916 011 373 (ext. 29) Móvil: +34 666 431 088 e-mail: jesus.navarro@andago.com