[postfix-es] log demasiado grande

[Fer]

Hola a todos, desde ayer que puse en marcha el web mail (squirrell) noto 
que el log del servidor postfix esta demasiado grande y tiene muchas 
repeticiones de cosas asi :

Nov  8 06:25:27 mail postfix/smtpd[29276]: 0CC90C2804D: 
client=localhost[127.0.0.1]
Nov  8 06:25:27 mail postfix/cleanup[29270]: 0CC90C2804D: 
message-id=<20091108082520.0CEE7C28016 en mail.coop54.com.ar>
Nov  8 06:25:27 mail postfix/qmgr[2484]: 0CC90C2804D: 
from=<root en sanchezhnossrl.com.ar>, size=1639, nrcpt=1 (queue active)
Nov  8 06:25:27 mail amavis[28881]: (28881-08) Passed CLEAN, 
<root en sanchezhnossrl.com.ar> -> <root en sanchezhnossrl.com.ar>, 
Message-ID: <2009
1108082520.0CEE7C28016 en mail.coop54.com.ar>, mail_id: QnJcS5w5RWE5, Hits: 
-2.597, size: 1226, queued_as: 0CC90C2804D, 6994 ms
Nov  8 06:25:27 mail postfix/smtp[29272]: 0CEE7C28016: 
to=<root en sanchezhnossrl.com.ar>, orig_to=<root>, 
relay=127.0.0.1[127.0.0.1]:10024, de
lay=15, delays=8.2/0/0/7, dsn=2.0.0, status=sent (250 2.0.0 Ok, 
id=28881-08, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 0CC90C2804
D)
Nov  8 06:25:27 mail postfix/error[29132]: 0CC90C2804D: 
to=<root en sanchezhnossrl.com.ar>, relay=none, delay=0.02, 
delays=0.01/0/0/0.01, dsn=4
.4.3, status=deferred (delivery temporarily suspended: Host or domain 
name not found. Name service error for name=sanchezhnossrl.com.ar type
=MX: Host not found, try again)
Nov  8 06:34:16 mail postfix/qmgr[2484]: 0CC90C2804D: 
from=<root en sanchezhnossrl.com.ar>, size=1639, nrcpt=1 (queue active)
Nov  8 06:34:31 mail postfix/smtp[29334]: 0CC90C2804D: 
to=<root en sanchezhnossrl.com.ar>, relay=none, delay=545, 
delays=529/0.02/15/0, dsn=4.4
.3, status=deferred (Host or domain name not found. Name service error 
for name=sanchezhnossrl.com.ar type=MX: Host not found, try again)
Nov  8 06:44:16 mail postfix/qmgr[2484]: 0CC90C2804D: 
from=<root en sanchezhnossrl.com.ar>, size=1639, nrcpt=1 (queue active)
Nov  8 06:44:32 mail postfix/error[29426]: 0CC90C2804D: 
to=<root en sanchezhnossrl.com.ar>, relay=none, delay=1146, 
delays=1130/16/0/0.02, dsn=
4.4.3, status=deferred (delivery temporarily suspended: Host or domain 
name not found. Name service error for name=sanchezhnossrl.com.ar typ
e=MX: Host not found, try again)
Nov  8 07:04:16 mail postfix/qmgr[2484]: 0CC90C2804D: 
from=<root en sanchezhnossrl.com.ar>, size=1639, nrcpt=1 (queue active)
Nov  8 07:04:31 mail postfix/smtp[29555]: 0CC90C2804D: 
to=<root en sanchezhnossrl.com.ar>, relay=none, delay=2345, 
delays=2329/0.01/16/0, dsn=4
.4.3, status=deferred (Host or domain name not found. Name service error 
for name=sanchezhnossrl.com.ar type=MX: Host not found, try again)
Nov  8 07:44:16 mail postfix/qmgr[2484]: 0CC90C2804D: 
from=<root en sanchezhnossrl.com.ar>, size=1639, nrcpt=1 (queue active)
Nov  8 07:44:31 mail postfix/smtp[29817]: 0CC90C2804D: 
to=<root en sanchezhnossrl.com.ar>, relay=none, delay=4745, 
delays=4730/0.01/15/0, dsn=4
.4.3, status=deferred (Host or domain name not found. Name service error 
for name=sanchezhnossrl.com.ar type=MX: Host not found, try again)
Nov  8 08:54:16 mail postfix/qmgr[2484]: 0CC90C2804D: 
from=<root en sanchezhnossrl.com.ar>, size=1639, nrcpt=1 (queue active)
Nov  8 08:54:31 mail postfix/smtp[30253]: 0CC90C2804D: 
to=<root en sanchezhnossrl.com.ar>, relay=none, delay=8945, 
delays=8929/0.01/15/0, dsn=4
.4.3, status=deferred (Host or domain name not found. Name service error 
for name=sanchezhnossrl.com.ar type=MX: Host not found, try again)
Nov  8 10:04:16 mail postfix/qmgr[2484]: 0CC90C2804D: 
from=<root en sanchezhnossrl.com.ar>, size=1639, nrcpt=1 (queue active)
Nov  8 10:04:31 mail postfix/smtp[30755]: 0CC90C2804D: 
to=<root en sanchezhnossrl.com.ar>, relay=none, delay=13145, 
delays=13129/0.01/16/0, dsn
=4.4.3, status=deferred (Host or domain name not found. Name service 
error for name=sanchezhnossrl.com.ar type

noto que tiene como cliente al localhost lo cual me parece raro, por las 
dudas baje el servicio del apache2 pero no se como para la generacion de 
esto.

alguna idea?

desde ya muchas gracias

Fernando