Hi, I've installed OTRS (2.0.4) on a Debian 4.0 (Etch) server: I've followed "the easy way", using the .deb package. I can log in and play around while reading OTRS docs. Everything looks fine. Whenever I log in and try to add a new user (or a new client) tough, I get an error page with this: ERROR: OTRS-CGI-10 Perl: 5.8.8 OS: linux Time: Tue May 8 19:35:44 2007 Message: Email address (filippo.f@condor.it) not valid (invalid filippo.f@condor.it (no mail exchanger (mx) found!)! )! Traceback (4323): Module: Kernel::System::User::UserAdd (v1.50) Line: 223 Module: Kernel::Modules::AdminUser::Run (v1.31 ) Line: 192 Module: Kernel::System::Web::InterfaceAgent::Run (v1.8) Line: 651 Module: ModPerl::ROOT::ModPerl::Registry::usr_share_otrs_bin_cgi_2dbin_index_2epl::handler (v) Line: 47 Module: (eval) (v1.80) Line: 203 Module: ModPerl::RegistryCooker::run (v1.80) Line: 203 Module: ModPerl::RegistryCooker::default_handler (v1.80) Line: 169 Module: ModPerl::Registry::handler (v1.99) Line: 30 I've found something about this, telling me to disable CheckMXsomething in Config.pm... which I've found in /etc/otrs/Kernel and looked already turned off. So, question is: what am I doing wrong or overlooking? What is my system missing? Is there any good-installation-checklist for otrs? Thanks in advance for any help. Cheers, Filippo