Hello everybody, I have a problem while updating to OTRS 5.. When I try to send an E-Mail via OTRS there expires an error: Fehlermeldung: Impossible to send message to: Martin@my-qh.de . Backend ERROR: OTRS-CGI-10 Perl: 5.14.2 OS: linux Time: Tue Nov 3 13:32:44 2015 Message: Impossible to send message to: Martin@my-qh.de . RemoteAddress: 172.22.0.172 RequestURI: /otrs/index.pl Traceback (16730): Module: Kernel::System::Ticket::Article::ArticleSend Line: 2228 Module: Kernel::Modules::AgentTicketCompose::Run Line: 797 Module: Kernel::System::Web::InterfaceAgent::Run Line: 1036 Module: ModPerl::ROOT::ModPerl::Registry::opt_otrs_bin_cgi_2dbin_index_2epl::handler Line: 40 Module: (eval) (v1.99) Line: 204 Module: ModPerl::RegistryCooker::run (v1.99) Line: 204 Module: ModPerl::RegistryCooker::default_handler (v1.99) Line: 170 Module: ModPerl::Registry::handler (v1.99) Line: 31 What i already did... Config.pm has been copied from the old OTRS instance. There are included the SMTP Settings. The old OTRS 4 works without any errors. My trys: - I have deleted the settings in config.pm and created on the Backend via sendmail the same settings again. - I have tested the telnet connection to our Microsoft Exchange server. ß Works fine - I have tested via sendmail ß works, but this is not what I want. - Checkmodules says "green" everywhere (except of not used Database connectors) Have you any ideas? Kind regards Martin