Hi I have installed OTRS system on Windows XP and trying to send e-mail tickets from the OTRS system through the SMTP mail server But i am getting the following exception ERROR: OTRS-CGI-10 Perl: 5.10.0 OS: MSWin32 Time: Mon Sep 7 14:57:56 2009 Message: SMTP authentication failed: 5355.7.3 Authentication unsuccessful. ! Enable Net::SMTP debug for more info! Traceback (1508): Module: Kernel::System::Email::SMTP::Send (v1.25) Line: 103 Module: Kernel::System::Email::Send (v1.64) Line: 683 Module: Kernel::System::Ticket::Article::ArticleSend (v1.230) Line: 2012 Module: Kernel::Modules::AgentTicketEmail::Run (v1.10) Line: 920 Module: Kernel::System::Web::InterfaceAgent::Run (v1.43) Line: 819 Module: ModPerl::ROOT::ModPerl::Registry::C_3a_Program_20Files_04Sep2009_OTRS_Installation_OTRS_OTRS_bin_cgi_2dbin_index_2epl::handler (unknown version) Line: 51 Module: (eval) (v1.88) Line: 204 Module: ModPerl::RegistryCooker::run (v1.88) Line: 204 Module: ModPerl::RegistryCooker::default_handler (v1.88) Line: 170 Module: ModPerl::Registry::handler (v1.99) Line: 31 I have added the SMTP configuration as given below to OTRS\OTRS\Kernel\Config.pm # SendmailModule $Self->{"SendmailModule"} = "Kernel::System::Email::SMTP"; $Self->{"SendmailModule::Host"} = "mail.vsnlxchange.com"; $Self->{"SendmailModule::Port"} = "25"; $Self->{"SendmailModule::AuthUser"} = "user1@tataelxsi.co.in"; $Self->{"SendmailModule::AuthPassword"} = "123456"; $Self->{'SendmailNotificationEnvelopeFrom'} = 'user1@tataelxsi.co.in'; Can someone help me in finding why the exception is occuring regards Sheela