I want that postfix check the users in the ldap db that a have running but the only way that i find is compiling a source of postfix, and if i do that i have no anymore updates of postfix, so i have to update manualy each time thats be needed, in debian exists a package of postfix compiled with ldap support, and with updates support, but no in centos, in the redhat networks exists ? or if i buy redhat , i will have the same problem? thanks ill wait for responses lucho