Hi, I installed a Cyrus 2.1 server on a Debian Sarge. Users authentication from ldap. I created users in ldap and mailboxes in cyrus but I can't send an email for them. I got "mail_via_smtp: 550 5.1.0 unknown user". If I created user in local passwd file I can send one. What do you think it can be problem? Thanks. Attila