Error sending to [ random domains ]

[Florin Portase]

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Hello,
I have some problems when I send mails to certain domains:

- - trouble domain [ cz.ibm.com ]

Error::
 - Dec 27 13:13:33 postdev postfix/postfix-script[2769]: starting the
Postfix mail system
Dec 27 13:13:33 postdev postfix/master[2770]: daemon started -- version
2.7.7, configuration /etc/postfix
Dec 27 13:13:33 postdev postfix/qmgr[2773]: 336AE85438:
from=<florin at postfix0s100.ro>, size=1850, nrcpt=1 (queue active)
Dec 27 13:13:35 postdev postfix/smtp[2778]: 336AE85438:
to=<calin1 at cz.ibm.com>, relay=e06-mx6.emea.ibm.com[195.75.94.113]:25,
delay=452, delays=450/0.03/2/0, dsn=5.0.0, status=bounced (host
e06-mx6.emea.ibm.com[195.75.94.113] refused to talk to me: 501 Syntax
error in parameters or arguments)
Dec 27 13:13:35 postdev postfix/cleanup[2780]: AC12586D40:
message-id=<20111227121335.AC12586D40 at postdev>
Dec 27 13:13:35 postdev postfix/qmgr[2773]: AC12586D40: from=<>,
size=3783, nrcpt=1 (queue active)
Dec 27 13:13:35 postdev postfix/bounce[2779]: 336AE85438: sender
non-delivery notification: AC12586D40
Dec 27 13:13:35 postdev postfix/qmgr[2773]: 336AE85438: removed
Dec 27 13:13:35 postdev postfix/pipe[2783]: AC12586D40:
to=<florin at postfix0s100.ro>, relay=dovecot, delay=0.18,
delays=0.02/0.01/0/0.15, dsn=2.0.0, status=sent (delivered via dovecot
service)
Dec 27 13:13:35 postdev postfix/qmgr[2773]: AC12586D40: removed

To mention: sending/receiving ( with same config files ) it's working
for Yahoo, Gmail, AOL, MSN... and others....
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