postfix problème avec gmx

[nlefebvre1]

bonjour j'ai un postfix dovecot qui marche avec mon adresse mail nlefebvre@nomdedomain.fr.

mais quand je met nico@nomdedomain.fr. et que j'envoie un mail a gmx il me dit:

Code :

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<nlefebvre@gmx.fr>: host mx0.gmx.net[213.165.64.100] said: 550-5.7.1 {mx077}
   Sorry, your helo has been denied. 550 5.7.1 (
   http://portal.gmx.net/serverrules ) (in reply to RCPT TO command)
Reporting-MTA: dns; ns1
X-Postfix-Queue-ID: C145F85E10A
X-Postfix-Sender: rfc822; nico@nomdedomain.fr
Arrival-Date: Tue,  8 Nov 2011 20:40:22 +0100 (CET)
 
Final-Recipient: rfc822; nlefebvre@gmx.fr
Original-Recipient: rfc822;nlefebvre@gmx.fr
Action: failed
Status: 5.7.1
Remote-MTA: dns; mx0.gmx.net
Diagnostic-Code: smtp; 550-5.7.1 {mx077} Sorry, your helo has been denied. 550
   5.7.1 ( http://portal.gmx.net/serverrules )

voici le log du mail.log

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  8 20:57:39 ns1 postfix/smtpd[26376]: connect from unknown[192.168.0.254]
Nov  8 20:57:39 ns1 postfix/smtpd[26376]: setting up TLS connection from unknown[192.168.0.254]
Nov  8 20:57:39 ns1 postfix/smtpd[26376]: Anonymous TLS connection established from unknown[192.168.0.254]: TLSv1 with cipher AES128-SHA (128/128 bits)
Nov  8 20:57:39 ns1 postfix/smtpd[26376]: D7FC785E18D: client=unknown[192.168.0.254], sasl_method=PLAIN, sasl_username=nlefebvre@nomdedomain.fr
Nov  8 20:57:39 ns1 postfix/cleanup[26379]: D7FC785E18D: message-id=<C336A2BC-842B-4B00-B9D8-9E30BCAEE4D7@nomdedomain.fr>
Nov  8 20:57:39 ns1 postfix/qmgr[2855]: D7FC785E18D: from=<nico@czmultimedia.fr>, size=635, nrcpt=1 (queue active)
Nov  8 20:57:44 ns1 postfix/smtp[26380]: D7FC785E18D: to=<nlefebvre@gmx.fr>, relay=mx0.gmx.net[213.165.64.100]:25, delay=4.8, delays=0.02/0/4.3/0.45, dsn=5.7.1, status=bounced (host mx0.gmx.net[213.165.64.100] said: 550-5.7.1 {mx086} Sorry, your helo has been denied. 550 5.7.1 ( http://portal.gmx.net/serverrules ) (in reply to RCPT TO command))
Nov  8 20:57:44 ns1 postfix/cleanup[26379]: B3D0B85E19B: message-id=<20111108195744.B3D0B85E19B@ns1>
Nov  8 20:57:44 ns1 postfix/qmgr[2855]: B3D0B85E19B: from=<>, size=2522, nrcpt=1 (queue active)
Nov  8 20:57:44 ns1 postfix/bounce[26381]: D7FC785E18D: sender non-delivery notification: B3D0B85E19B
Nov  8 20:57:44 ns1 postfix/qmgr[2855]: D7FC785E18D: removed
Nov  8 20:57:44 ns1 postfix/pipe[26382]: B3D0B85E19B: to=<nico@nomdedomain.fr>, relay=dovecot, delay=0.02, delays=0.01/0/0/0.01, dsn=2.0.0, status=sent (delivered via dovecot service)
Nov  8 20:57:44 ns1 postfix/qmgr[2855]: B3D0B85E19B: removed
Nov  8 20:58:39 ns1 postfix/smtpd[26376]: disconnect from unknown[192.168.0.254]
Nov  8 21:00:13 ns1 postfix/qmgr[2855]: 5E67A85E10A: from=<double-bounce@mail.nomdedomain.fr>, size=247, nrcpt=1 (queue active)
Nov  8 21:00:13 ns1 postfix/qmgr[2855]: 5E67A85E10A: removed

si quelqu'un peu m'aider je le remerci d'avance.