Good morning everyone maybe someone can help me. I want to install and configure various applications such OTRS Zabbix and around the outside. so I can customize it to have got postfix working on my server and as such follow the installation steps of the tutorial Virtual Users With Postfix, Dovecot, MySQL, RoundCube, iRedAdmin On Debian 6. I think that my installation was 100% good following all the steps that this woe. unfortunately to send a message to the accounts created get the error SMTP error (550) Failed to add recipient email@example.com
(5.1.0: Sender address rejected: unknow user in local recipient table). someone can tell me where it should be the fault?