Error con el server de correo

[lserranob@ipichgc.rimed.cu]

   Buenas tardes, miran ... he montado un servidor de correo y cada vez
que intento entrar un usuario en squirrelmail me da el siguiente error:
   ERROR: Connection dropped by IMAP server.

Y cuando pruebo el pop3 me devuelve esto:

server:/home/lino# telnet localhost 110
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
+OK Hello there.
user lgarnicar
+OK Password required.
pass lgarnicar
-ERR Temporary problem, please try again later
Connection closed by foreign host.
server:/home/lino#

Y este es el log de errores:

May 12 01:45:30 server imapd: Connection, ip=[::ffff:127.0.0.1]
May 12 01:45:30 server authdaemond: ldap_simple_bind_s failed: Can't
contact LDA
P server
May 12 01:45:30 server authdaemond: ldap_simple_bind_s failed: Can't
contact LDA
P server
May 12 01:45:30 server imapd: LOGIN FAILED, user=lgarnicar,
ip=[::ffff:127.0.0.1
]
May 12 01:45:30 server imapd: authentication error: Input/output error
May 12 01:46:37 server pop3d: Connection, ip=[::ffff:127.0.0.1]
May 12 01:46:44 server authdaemond: ldap_simple_bind_s failed: Can't
contact LDA
P server
May 12 01:46:44 server pop3d: LOGIN FAILED, user=lgarnicar,
ip=[::ffff:127.0.0.1
]
May 12 01:46:44 server pop3d: authentication error: Input/output error
May 12 01:46:44 server authdaemond: ldap_simple_bind_s failed: Can't
contact LDA
P server

Ya no se que pueda hacer para que funciones.... No tengo idea... Hay
alguien que pueda ayudarme con este problema.....





---------------------------------------
  Instituto Politenico de Informatica
       Gervasio Cabrera Martinez
             MINED - Cuba
         http://www.rimed.cu
--
Sent: Thursday, 13 May 2010. 10:46:36.
By Postfix in Debian (GNU/Linux)