Now it's run.
here the log:
2011-02-21 12:39:15 DEBUG smtp session: request=smtpd_access_policy
2011-02-21 12:39:15 DEBUG smtp session: protocol_state=RCPT
2011-02-21 12:39:15 DEBUG smtp session: protocol_name=ESMTP
2011-02-21 12:39:15 DEBUG smtp session: client_address=192.168.37.33
2011-02-21 12:39:15 DEBUG smtp session: client_name=unknown
2011-02-21 12:39:15 DEBUG smtp session: reverse_client_name=unknown
2011-02-21 12:39:15 DEBUG smtp session: helo_name=DELL
2011-02-21 12:39:15 DEBUG smtp session: sender=enrico@xxxx.xxxx.com
2011-02-21 12:39:15 DEBUG smtp session: recipient=enri@gmail.com
2011-02-21 12:39:15 DEBUG smtp session: recipient_count=0
2011-02-21 12:39:15 DEBUG smtp session: queue_id=
2011-02-21 12:39:15 DEBUG smtp session: instance=5998.4d624ee3.bdaa3.0
2011-02-21 12:39:15 DEBUG smtp session: size=0
2011-02-21 12:39:15 DEBUG smtp session: etrn_domain=
2011-02-21 12:39:15 DEBUG smtp session: stress=
2011-02-21 12:39:15 DEBUG smtp session: sasl_method=
2011-02-21 12:39:15 DEBUG smtp session: sasl_username=
2011-02-21 12:39:15 DEBUG smtp session: sasl_sender=
2011-02-21 12:39:15 DEBUG smtp session: ccert_subject=
2011-02-21 12:39:15 DEBUG smtp session: ccert_issuer=
2011-02-21 12:39:15 DEBUG smtp session: ccert_fingerprint=
2011-02-21 12:39:15 DEBUG smtp session: encryption_protocol=
2011-02-21 12:39:15 DEBUG smtp session: encryption_cipher=
2011-02-21 12:39:15 DEBUG smtp session: encryption_keysize=0
2011-02-21 12:39:15 DEBUG LDAP connection initialied success.
2011-02-21 12:39:15 DEBUG LDAP bind success.
2011-02-21 12:39:15 DEBUG __get_sender_dn_ldif (sender): enrico@xxxx.xxxx.com
2011-02-21 12:39:15 DEBUG __get_sender_dn_ldif: Quering LDAP
2011-02-21 12:39:15 DEBUG __get_sender_dn_ldif (result): [('mail=enrico@xxxx.xxxx.com,ou=Users,domainName=xxxx.xxxx.com,o=domains,dc=xxxx,dc=xxxx,dc=com', {'shadowAddress': ['enrico@xxxx.xxxx.it'], 'uid': ['enrico'], 'mailQuota': ['1073741824'], 'objectClass': ['inetOrgPerson', 'mailUser', 'shadowAccount', 'amavisAccount'], 'userPassword': ['{SSHA}GsvLTawjgV8xxxxx2LDtB4muFWxxxxw=='], 'homeDirectory': ['/var/vmail/vmail1/xxxx.xxxx.com/e/en/enr/enrico-2010.06.10.17.11.16/'], 'accountStatus': ['active'], 'mailBlacklistRecipient': ['enri@gmail.com'], 'amavisBlacklistSender': ['enri@gmail.com'], 'mtaTransport': ['dovecot'], 'sn': ['enrico'], 'storageBaseDirectory': ['/var/vmail'], 'mail': ['enrico@xxxx.xxxx.com'], 'mailMessageStore': ['vmail1/xxxx.xxxx.com/e/en/enr/enrico-2010.06.10.17.11.16/'], 'enabledService': ['mail', 'smtp', 'deliver', 'pop3', 'pop3secured', 'imap', 'imapsecured', 'managesieve', 'managesievesecured', 'sieve', 'sievesecured', 'internal', 'forward', 'senderbcc', 'recipientbcc', 'shadowaddress', 'displayedInGlobalAddressBook'], 'cn': ['Enrico']})]
2011-02-21 12:39:15 DEBUG Apply plugin (ldap_recipient_restrictions).
2011-02-21 12:39:15 DEBUG Response from plugin (ldap_recipient_restrictions): REJECT Not authorized
2011-02-21 12:39:15 INFO Response from plugin (ldap_recipient_restrictions): REJECT Not authorized
2011-02-21 12:39:15 DEBUG Final action: REJECT Not authorized.
2011-02-21 12:39:15 INFO enrico@xxxx.xxxx.com -> enri@gmail.com, REJECT Not authorized
2011-02-21 12:39:15 DEBUG Connection closed
There is no SASL authentication my ip is in mynetwork in main.cf of postfix.