OK,
here a session of the logfile:
2013-03-05 14:43:23 DEBUG Connect from 127.0.0.1, port 40867.
2013-03-05 14:43:23 DEBUG smtp session: request=smtpd_access_policy
2013-03-05 14:43:23 DEBUG smtp session: protocol_state=RCPT
2013-03-05 14:43:23 DEBUG smtp session: protocol_name=ESMTP
2013-03-05 14:43:23 DEBUG smtp session: client_address=xxx.xxx.xxx.xxx
2013-03-05 14:43:23 DEBUG smtp session: client_name=mail-we0-f174.google.com
2013-03-05 14:43:23 DEBUG smtp session: reverse_client_name=mail-we0-f174.google.com
2013-03-05 14:43:23 DEBUG smtp session: helo_name=mail-we0-f174.google.com
2013-03-05 14:43:23 DEBUG smtp session: sender=sender@sender-domain.com
2013-03-05 14:43:23 DEBUG smtp session: recipient=recipient@local-domain.com
2013-03-05 14:43:23 DEBUG smtp session: recipient_count=0
2013-03-05 14:43:23 DEBUG smtp session: queue_id=
2013-03-05 14:43:23 DEBUG smtp session: instance=4ad8.5135f67b.8ad95.0
2013-03-05 14:43:23 DEBUG smtp session: size=0
2013-03-05 14:43:23 DEBUG smtp session: etrn_domain=
2013-03-05 14:43:23 DEBUG smtp session: stress=
2013-03-05 14:43:23 DEBUG smtp session: sasl_method=
2013-03-05 14:43:23 DEBUG smtp session: sasl_username=
2013-03-05 14:43:23 DEBUG smtp session: sasl_sender=
2013-03-05 14:43:23 DEBUG smtp session: ccert_subject=
2013-03-05 14:43:23 DEBUG smtp session: ccert_issuer=
2013-03-05 14:43:23 DEBUG smtp session: ccert_fingerprint=
2013-03-05 14:43:23 DEBUG smtp session: ccert_pubkey_fingerprint=
2013-03-05 14:43:23 DEBUG smtp session: encryption_protocol=TLSv1
2013-03-05 14:43:23 DEBUG smtp session: encryption_cipher=ECDHE-RSA-RC4-SHA
2013-03-05 14:43:23 DEBUG smtp session: encryption_keysize=128
2013-03-05 14:43:23 DEBUG LDAP connection initialied success.
2013-03-05 14:43:23 DEBUG LDAP bind success.
2013-03-05 14:43:23 DEBUG --> Apply plugin: reject_sender_login_mismatch
2013-03-05 14:43:23 DEBUG Sender: sender@sender-domain.com, SASL username:
2013-03-05 14:43:23 DEBUG <-- Result: DUNNO
2013-03-05 14:43:23 DEBUG [+] Getting LDIF data of account: sender@sender-domain.com
2013-03-05 14:43:23 DEBUG search filter: (&(|(mail=sender@sender-domain.com)(shadowAddress=sender@sender-domain.com))(|(objectClass=mailUser)(objectClass=mailList)(objectClass=mailAlias)))
2013-03-05 14:43:23 DEBUG search attributes: ['objectClass', 'mailBlacklistedRecipient', 'mailWhitelistRecipient']
2013-03-05 14:43:23 DEBUG Not a local account.
2013-03-05 14:43:23 DEBUG --> Apply plugin: ldap_recipient_restrictions
2013-03-05 14:43:23 DEBUG <-- Result: DUNNO (No sender LDIF data)
2013-03-05 14:43:23 DEBUG [+] Getting LDIF data of account: recipient@local-domain.com
2013-03-05 14:43:23 DEBUG search filter: (&(|(mail=recipient@local-domain.com)(shadowAddress=recipient@local-domain.com))(|(objectClass=mailUser)(objectClass=mailList)(objectClass=mailAlias)))
2013-03-05 14:43:23 DEBUG search attributes: ['objectClass', 'listAllowedUser', 'accessPolicy', 'amavisBlacklistSender', 'amavisWhitelistSender']
2013-03-05 14:43:23 DEBUG result: [('mail=recipient@local-domain.com,ou=Users,domainName=local-domain.com,o=domains,dc=local-domain,dc=com', {'objectClass': ['inetOrgPerson', 'mailUser', 'shadowAccount', 'amavisAccount']})]
2013-03-05 14:43:23 DEBUG --> Apply plugin: ldap_maillist_access_policy
2013-03-05 14:43:23 DEBUG <-- Result: DUNNO (Not a mail list account)
2013-03-05 14:43:23 DEBUG --> Apply plugin: ldap_amavisd_block_blacklisted_senders
2013-03-05 14:43:23 DEBUG Sender: sender@sender-domain.com
2013-03-05 14:43:23 DEBUG Whitelisted senders: set([])
2013-03-05 14:43:23 DEBUG Blacklisted senders: set([])
2013-03-05 14:43:23 DEBUG <-- Result: DUNNO (No white/blacklist records found)
2013-03-05 14:43:23 INFO [74.125.82.174] sender@sender-domain.com -> recipient@local-domain.com, DUNNO
2013-03-05 14:43:23 DEBUG Connection closed
2013-03-05 14:43:23 DEBUG Close LDAP connection.Best,
Achim