I am installing postfix. I configured the main.cf with the local ip 127.0.0.1. I created a firstname.lastname@example.org in my bdd (phpmyadmin). But when I send an email using telnet, I put : rcpt to: and I have a message error "Temporary lookup failure ". So the mail is not sent, what does this message mean exactly ?
Look at the error as shown in the postfix mail log -- for security reasons, Postfix does not reveal all it knows to unauthenticated clients.