Manuel Monteiro wrote: > > > Dear all, > > > > I have a mail server based on a CentOS 5.3 machine with postfix. > > > > Most of our users are on LDAP (on localhost) but we also have some local > users and we are using PAM for authentication. Are you running nscd on the server? That should smooth out LDAP blips, though I would disable nscd's dns caching in /etc/nscd.conf Is postfix configured to talk directly to LDAP ? What does the configuration look like? nate