The information OTRS has for authenticating to your outbound SMTP server is incorrect. Verify you have the correct userid and password, and enter them in the OTRS control panel. If you still get this error, then your SMTP provider has changed your information and you need to pursue it with the person running the SMTP server. From: otrs-bounces@otrs.org [mailto:otrs-bounces@otrs.org] On Behalf Of Marcos S Sent: Thursday, April 25, 2013 3:15 PM To: otrs@otrs.org Subject: [otrs] Erro: SMTP authentication failed: 5355.7.8 Error: authentication failed: authenticatio[..] Hi, I need help with this issue Erro: SMTP authentication failed: 5355.7.8 Error: authentication failed: authenticatio[..] ERROR: OTRS-CGI-10 Perl: 5.8.8 OS: linux Time: Thu Apr 25 16:15:15 2013 Message: SMTP authentication failed: 5355.7.8 Error: authentication failed: authentication failure ! Enable Net::SMTP debug for more info! Traceback (7239): Module: Kernel::System::Email::SMTP::Send (v1.25) Line: 103 Module: Kernel::System::Email::Send (v1.64.2.1) Line: 690 Module: Kernel::System::Ticket::Article::ArticleSend (v1.232.2.1) Line: 2027 Module: Kernel::Modules::AgentTicketEmail::Run (v1.99.2.3) Line: 812 Module: Kernel::System::Web::InterfaceAgent::Run (v1.43.2.1) Line: 819 Module: /opt/otrs/bin/cgi-bin/index.plhttp://index.pl (v1.88) Line: 48