Thank you, this solved the problem. Agustín De: Bruno Rubio [mailto:brubio@WAILUATECH.COM] Enviado el: lunes, 21 de septiembre de 2009 20:12 Para: adelanda@inmagusa.com; User questions and discussions about OTRS. Asunto: RE: [otrs] OTRS is not sending e-mails under Admin | sysconfig | Framework | sendmail --> there you can configure you mailserver, account and password to use when sending emails _____ From: otrs-bounces@otrs.org [otrs-bounces@otrs.org] On Behalf Of Agustin de Landa Gil [adelanda@inmagusa.com] Sent: Monday, September 21, 2009 7:11 PM To: otrs@otrs.org Subject: [otrs] OTRS is not sending e-mails Hello I am facing the following problem: No mails are sent of any event to the agents. The error I get in the log is the following: [Mon Sep 21 16:07:10 2009][Notice][Kernel::System::Ticket::Article::SendAgentNotification] Sent agent 'NewTicket' notification to 'igutierrez@inmagusa.com'. [Mon Sep 21 16:07:10 2009][Error][Kernel::System::Email::SMTP::Send][116] Can't use from '': 550Requested action not taken: mailbox unavailable ! Enable Net::SMTP debug for more info! I think I am missing the definition of an e-mail to be used, but where should I define it. Thanks, Agustín de Landa