Problems with postfix ldap

[fire67]

Hello i have configured openldap and postfix on freebsd 5.4 and i have a problem with sending mail with a user ldap.For example , this user http://www.linux-win.org/user.ldif can connect to imapd serveur but not sending mail and i don't know why.My main.cf is http://www.linux-win.org/main.cf and i have add the "auth include ldap" in /etc/pam.d/system , in /etc/pam.d/imap.The error when i sending a mail is : 
450 <flo at linux-win.org>: Recipient address rejected: User unknown in local recipient table

Anyone have a solution ?