I don't know is it relevant but in /opt/iredapd/settings.py in last section (# Log reject (and other non-DUNNO) action in iRedAdmin SQL database) iredadmin_db_password is set to 'password' so I corrected this to correct password.
2015-06-10 09:15:53 DEBUG smtp session: request=smtpd_access_policy
2015-06-10 09:15:53 DEBUG smtp session: protocol_state=RCPT
2015-06-10 09:15:53 DEBUG smtp session: protocol_name=ESMTP
2015-06-10 09:15:53 DEBUG smtp session: client_address=107.181.172.72
2015-06-10 09:15:53 DEBUG smtp session: client_name=server.simotamo.com
2015-06-10 09:15:53 DEBUG smtp session: reverse_client_name=server.simotamo.com
2015-06-10 09:15:53 DEBUG smtp session: helo_name=server.simotamo.com
2015-06-10 09:15:53 DEBUG smtp session: sender=bounce@temporis.hr
2015-06-10 09:15:53 DEBUG smtp session: recipient=bkXXXXX@efzg.hr
2015-06-10 09:15:53 DEBUG smtp session: recipient_count=0
2015-06-10 09:15:53 DEBUG smtp session: queue_id=
2015-06-10 09:15:53 DEBUG smtp session: instance=3a02.5577e429.83742.0
2015-06-10 09:15:53 DEBUG smtp session: size=57238
2015-06-10 09:15:53 DEBUG smtp session: etrn_domain=
2015-06-10 09:15:53 DEBUG smtp session: stress=
2015-06-10 09:15:53 DEBUG smtp session: sasl_method=
2015-06-10 09:15:53 DEBUG smtp session: sasl_username=
2015-06-10 09:15:53 DEBUG smtp session: sasl_sender=
2015-06-10 09:15:53 DEBUG smtp session: ccert_subject=
2015-06-10 09:15:53 DEBUG smtp session: ccert_issuer=
2015-06-10 09:15:53 DEBUG smtp session: ccert_fingerprint=
2015-06-10 09:15:53 DEBUG smtp session: ccert_pubkey_fingerprint=
2015-06-10 09:15:53 DEBUG smtp session: encryption_protocol=TLSv1.2
2015-06-10 09:15:53 DEBUG smtp session: encryption_cipher=ECDHE-RSA-AES256-GCM-SHA384
2015-06-10 09:15:53 DEBUG smtp session: encryption_keysize=256
2015-06-10 09:15:53 DEBUG LDAP connection initialied success.
2015-06-10 09:15:53 DEBUG LDAP bind success.
2015-06-10 09:15:53 DEBUG --> Apply plugin: reject_null_sender
2015-06-10 09:15:53 DEBUG <-- Result: DUNNO
2015-06-10 09:15:53 DEBUG Skip plugin: amavisd_message_size_limit (protocol_state != RCPT)
2015-06-10 09:15:53 DEBUG --> Apply plugin: amavisd_wblist
2015-06-10 09:15:53 DEBUG Possible policy senders: ['@.', 'bounce@temporis.hr', '@temporis.hr', '@.temporis.hr', '@hr', '@.hr', '107.181.172.72', '107.181.*.72', '*.181.172.72', '107.*.172.72', '107.181.172.*', '*.*.*.72', '107.*.*.72', '107.181.*.*', '*.*.172.72', '107.*.*.*', '*.*.*.*']
2015-06-10 09:15:53 DEBUG Possible policy recipients: ['@.', 'bkXXXXX@efzg.hr', '@efzg.hr', '@.efzg.hr', '@hr', '@.hr', 'bkXXXXX@*']
2015-06-10 09:15:53 DEBUG SQL: Get policy senders: SELECT id,email FROM mailaddr WHERE email IN ('@.', 'bounce@temporis.hr', '@temporis.hr', '@.temporis.hr', '@hr', '@.hr', '107.181.172.72', '107.181.*.72', '*.181.172.72', '107.*.172.72', '107.181.172.*', '*.*.*.72', '107.*.*.72', '107.181.*.*', '*.*.172.72', '107.*.*.*', '*.*.*.*') ORDER BY priority DESC
2015-06-10 09:15:53 DEBUG No senders found in SQL database.
2015-06-10 09:15:53 DEBUG <-- Result: DUNNO
2015-06-10 09:15:53 DEBUG [+] Getting LDIF data of account: bkXXXXX@efzg.hr
2015-06-10 09:15:53 DEBUG search base dn: o=domains,dc=efzg,dc=hr
2015-06-10 09:15:53 DEBUG search scope: SUBTREE
2015-06-10 09:15:53 DEBUG search filter: (&(|(mail=bkXXXXX@efzg.hr)(shadowAddress=bkXXXXX@efzg.hr))(|(objectClass=mailUser)(objectClass=mailList)(objectClass=mailAlias)))
2015-06-10 09:15:53 DEBUG search attributes: ['objectClass', 'listAllowedUser', 'accessPolicy']
2015-06-10 09:15:53 DEBUG result: [('mail=bkXXXXXpl@efzg.hr,ou=Users,domainName=efzg.hr,o=domains,dc=efzg,dc=hr', {'objectClass': ['inetOrgPerson', 'shadowAccount', 'amavisAccount', 'mailUser', 'top']})]
2015-06-10 09:15:53 DEBUG --> Apply plugin: ldap_maillist_access_policy
2015-06-10 09:15:53 DEBUG <-- Result: DUNNO (Not a mail list account)
2015-06-10 09:15:53 INFO [107.181.172.72] RCPT, bounce@temporis.hr -> bkXXXXX@efzg.hr, DUNNO
2015-06-10 09:15:53 DEBUG Session ended
2015-06-10 09:15:53 DEBUG Close LDAP connection.
2015-06-10 09:15:53 DEBUG smtp session: request=smtpd_access_policy
2015-06-10 09:15:53 DEBUG smtp session: protocol_state=RCPT
2015-06-10 09:15:53 DEBUG smtp session: protocol_name=ESMTP
2015-06-10 09:15:53 DEBUG smtp session: client_address=107.181.172.72
2015-06-10 09:15:53 DEBUG smtp session: client_name=server.simotamo.com
2015-06-10 09:15:53 DEBUG smtp session: reverse_client_name=server.simotamo.com
2015-06-10 09:15:53 DEBUG smtp session: helo_name=server.simotamo.com
2015-06-10 09:15:53 DEBUG smtp session: sender=bounce@temporis.hr
2015-06-10 09:15:53 DEBUG smtp session: recipient=deXXX@efzg.hr
2015-06-10 09:15:53 DEBUG smtp session: recipient_count=0
2015-06-10 09:15:53 DEBUG smtp session: queue_id=
2015-06-10 09:15:53 DEBUG smtp session: instance=1a20.5577e429.83dd8.0
2015-06-10 09:15:53 DEBUG smtp session: size=57234
2015-06-10 09:15:53 DEBUG smtp session: etrn_domain=
2015-06-10 09:15:53 DEBUG smtp session: stress=
2015-06-10 09:15:53 DEBUG smtp session: sasl_method=
2015-06-10 09:15:53 DEBUG smtp session: sasl_username=
2015-06-10 09:15:53 DEBUG smtp session: sasl_sender=
2015-06-10 09:15:53 DEBUG smtp session: ccert_subject=
2015-06-10 09:15:53 DEBUG smtp session: ccert_issuer=
2015-06-10 09:15:53 DEBUG smtp session: ccert_fingerprint=
2015-06-10 09:15:53 DEBUG smtp session: ccert_pubkey_fingerprint=
2015-06-10 09:15:53 DEBUG smtp session: encryption_protocol=TLSv1.2
2015-06-10 09:15:53 DEBUG smtp session: encryption_cipher=ECDHE-RSA-AES256-GCM-SHA384
2015-06-10 09:15:53 DEBUG smtp session: encryption_keysize=256
2015-06-10 09:15:53 DEBUG LDAP connection initialied success.
2015-06-10 09:15:53 DEBUG LDAP bind success.
2015-06-10 09:15:53 DEBUG --> Apply plugin: reject_null_sender
2015-06-10 09:15:53 DEBUG <-- Result: DUNNO
2015-06-10 09:15:53 DEBUG Skip plugin: amavisd_message_size_limit (protocol_state != RCPT)
2015-06-10 09:15:53 DEBUG --> Apply plugin: amavisd_wblist
2015-06-10 09:15:53 DEBUG Possible policy senders: ['@.', 'bounce@temporis.hr', '@temporis.hr', '@.temporis.hr', '@hr', '@.hr', '107.181.172.72', '107.181.*.72', '*.181.172.72', '107.*.172.72', '107.181.172.*', '*.*.*.72', '107.*.*.72', '107.181.*.*', '*.*.172.72', '107.*.*.*', '*.*.*.*']
2015-06-10 09:15:53 DEBUG Possible policy recipients: ['@.', 'deXXX@efzg.hr', '@efzg.hr', '@.efzg.hr', '@hr', '@.hr', 'deXXX@*']
2015-06-10 09:15:53 DEBUG SQL: Get policy senders: SELECT id,email FROM mailaddr WHERE email IN ('@.', 'bounce@temporis.hr', '@temporis.hr', '@.temporis.hr', '@hr', '@.hr', '107.181.172.72', '107.181.*.72', '*.181.172.72', '107.*.172.72', '107.181.172.*', '*.*.*.72', '107.*.*.72', '107.181.*.*', '*.*.172.72', '107.*.*.*', '*.*.*.*') ORDER BY priority DESC
2015-06-10 09:15:53 DEBUG No senders found in SQL database.
2015-06-10 09:15:53 DEBUG <-- Result: DUNNO
2015-06-10 09:15:53 DEBUG [+] Getting LDIF data of account: deXXX@efzg.hr
2015-06-10 09:15:53 DEBUG search base dn: o=domains,dc=efzg,dc=hr
2015-06-10 09:15:53 DEBUG search scope: SUBTREE
2015-06-10 09:15:53 DEBUG search filter: (&(|(mail=deXXX@efzg.hr)(shadowAddress=deXXX@efzg.hr))(|(objectClass=mailUser)(objectClass=mailList)(objectClass=mailAlias)))
2015-06-10 09:15:53 DEBUG search attributes: ['objectClass', 'listAllowedUser', 'accessPolicy']
2015-06-10 09:15:53 DEBUG result: [('mail=dXXX@efzg.hr,ou=Users,domainName=efzg.hr,o=domains,dc=efzg,dc=hr', {'objectClass': ['amavisAccount', 'shadowAccount', 'mailUser', 'inetOrgPerson']})]
2015-06-10 09:15:53 DEBUG --> Apply plugin: ldap_maillist_access_policy
2015-06-10 09:15:53 DEBUG <-- Result: DUNNO (Not a mail list account)
2015-06-10 09:15:53 INFO [107.181.172.72] RCPT, bounce@temporis.hr -> deXXX@efzg.hr, DUNNO
2015-06-10 09:15:53 DEBUG Session ended
2015-06-10 09:15:53 DEBUG Close LDAP connection.
2015-06-10 09:15:54 DEBUG smtp session: request=smtpd_access_policy
2015-06-10 09:15:54 DEBUG smtp session: protocol_state=END-OF-MESSAGE
2015-06-10 09:15:54 DEBUG smtp session: protocol_name=ESMTP
2015-06-10 09:15:54 DEBUG smtp session: client_address=107.181.172.72
2015-06-10 09:15:54 DEBUG smtp session: client_name=server.simotamo.com
2015-06-10 09:15:54 DEBUG smtp session: reverse_client_name=server.simotamo.com
2015-06-10 09:15:54 DEBUG smtp session: helo_name=server.simotamo.com
2015-06-10 09:15:54 DEBUG smtp session: sender=bounce@temporis.hr
2015-06-10 09:15:54 DEBUG smtp session: recipient=deXXX@efzg.hr
2015-06-10 09:15:54 DEBUG smtp session: recipient_count=1
2015-06-10 09:15:54 DEBUG smtp session: queue_id=C59E0202868F06
2015-06-10 09:15:54 DEBUG smtp session: instance=1a20.5577e429.83dd8.0
2015-06-10 09:15:54 DEBUG smtp session: size=56589
2015-06-10 09:15:54 DEBUG smtp session: etrn_domain=
2015-06-10 09:15:54 DEBUG smtp session: stress=
2015-06-10 09:15:54 DEBUG smtp session: sasl_method=
2015-06-10 09:15:54 DEBUG smtp session: sasl_username=
2015-06-10 09:15:54 DEBUG smtp session: sasl_sender=
2015-06-10 09:15:54 DEBUG smtp session: ccert_subject=
2015-06-10 09:15:54 DEBUG smtp session: ccert_issuer=
2015-06-10 09:15:54 DEBUG smtp session: ccert_fingerprint=
2015-06-10 09:15:54 DEBUG smtp session: ccert_pubkey_fingerprint=
2015-06-10 09:15:54 DEBUG smtp session: encryption_protocol=TLSv1.2
2015-06-10 09:15:54 DEBUG smtp session: encryption_cipher=ECDHE-RSA-AES256-GCM-SHA384
2015-06-10 09:15:54 DEBUG smtp session: encryption_keysize=256
2015-06-10 09:15:54 DEBUG LDAP connection initialied success.
2015-06-10 09:15:54 DEBUG LDAP bind success.
2015-06-10 09:15:54 DEBUG Skip plugin: reject_null_sender (protocol_state != END-OF-MESSAGE)
2015-06-10 09:15:54 DEBUG --> Apply plugin: amavisd_message_size_limit
2015-06-10 09:15:54 DEBUG Message size: 56589
2015-06-10 09:15:54 DEBUG Getting applicable policies
2015-06-10 09:15:54 DEBUG Valid policy accounts for recipient deXXX@efzg.hr: 'deXXX@efzg.hr', '@efzg.hr', '@.efzg.hr', '@.'
2015-06-10 09:15:54 DEBUG SELECT policy_name,message_size_limit
FROM users, policy
WHERE
(users.policy_id=policy.id)
AND (users.email IN ('deXXX@efzg.hr', '@efzg.hr', '@.efzg.hr', '@.'))
ORDER BY users.priority DESC
2015-06-10 09:15:54 DEBUG No policy found.
2015-06-10 09:15:54 DEBUG <-- Result: DUNNO
2015-06-10 09:15:54 DEBUG Skip plugin: amavisd_wblist (protocol_state != END-OF-MESSAGE)
2015-06-10 09:15:54 DEBUG Skip plugin: ldap_maillist_access_policy (protocol_state != END-OF-MESSAGE)
2015-06-10 09:15:54 INFO [107.181.172.72] END-OF-MESSAGE, bounce@temporis.hr -> deXXX@efzg.hr, DUNNO
2015-06-10 09:15:54 DEBUG Session ended
2015-06-10 09:15:54 DEBUG Close LDAP connection.
2015-06-10 09:15:54 DEBUG smtp session: request=smtpd_access_policy
2015-06-10 09:15:54 DEBUG smtp session: protocol_state=END-OF-MESSAGE
2015-06-10 09:15:54 DEBUG smtp session: protocol_name=ESMTP
2015-06-10 09:15:54 DEBUG smtp session: client_address=107.181.172.72
2015-06-10 09:15:54 DEBUG smtp session: client_name=server.simotamo.com
2015-06-10 09:15:54 DEBUG smtp session: reverse_client_name=server.simotamo.com
2015-06-10 09:15:54 DEBUG smtp session: helo_name=server.simotamo.com
2015-06-10 09:15:54 DEBUG smtp session: sender=bounce@temporis.hr
2015-06-10 09:15:54 DEBUG smtp session: recipient=bkXXXXX@efzg.hr
2015-06-10 09:15:54 DEBUG smtp session: recipient_count=1
2015-06-10 09:15:54 DEBUG smtp session: queue_id=C26CE202868F04
2015-06-10 09:15:54 DEBUG smtp session: instance=3a02.5577e429.83742.0
2015-06-10 09:15:54 DEBUG smtp session: size=56593
2015-06-10 09:15:54 DEBUG smtp session: etrn_domain=
2015-06-10 09:15:54 DEBUG smtp session: stress=
2015-06-10 09:15:54 DEBUG smtp session: sasl_method=
2015-06-10 09:15:54 DEBUG smtp session: sasl_username=
2015-06-10 09:15:54 DEBUG smtp session: sasl_sender=
2015-06-10 09:15:54 DEBUG smtp session: ccert_subject=
2015-06-10 09:15:54 DEBUG smtp session: ccert_issuer=
2015-06-10 09:15:54 DEBUG smtp session: ccert_fingerprint=
2015-06-10 09:15:54 DEBUG smtp session: ccert_pubkey_fingerprint=
2015-06-10 09:15:54 DEBUG smtp session: encryption_protocol=TLSv1.2
2015-06-10 09:15:54 DEBUG smtp session: encryption_cipher=ECDHE-RSA-AES256-GCM-SHA384
2015-06-10 09:15:54 DEBUG smtp session: encryption_keysize=256
2015-06-10 09:15:54 DEBUG LDAP connection initialied success.
2015-06-10 09:15:54 DEBUG LDAP bind success.
2015-06-10 09:15:54 DEBUG Skip plugin: reject_null_sender (protocol_state != END-OF-MESSAGE)
2015-06-10 09:15:54 DEBUG --> Apply plugin: amavisd_message_size_limit
2015-06-10 09:15:54 DEBUG Message size: 56593
2015-06-10 09:15:54 DEBUG Getting applicable policies
2015-06-10 09:15:54 DEBUG Valid policy accounts for recipient bkXXXXX@efzg.hr: 'bkXXXXX@efzg.hr', '@efzg.hr', '@.efzg.hr', '@.'
2015-06-10 09:15:54 DEBUG SELECT policy_name,message_size_limit
FROM users, policy
WHERE
(users.policy_id=policy.id)
AND (users.email IN ('bkXXXXX@efzg.hr', '@efzg.hr', '@.efzg.hr', '@.'))
ORDER BY users.priority DESC
2015-06-10 09:15:54 DEBUG No policy found.
2015-06-10 09:15:54 DEBUG <-- Result: DUNNO
2015-06-10 09:15:54 DEBUG Skip plugin: amavisd_wblist (protocol_state != END-OF-MESSAGE)
2015-06-10 09:15:54 DEBUG Skip plugin: ldap_maillist_access_policy (protocol_state != END-OF-MESSAGE)
2015-06-10 09:15:54 INFO [107.181.172.72] END-OF-MESSAGE, bounce@temporis.hr -> bkXXXXX@efzg.hr, DUNNO
2015-06-10 09:15:54 DEBUG Session ended
2015-06-10 09:15:54 DEBUG Close LDAP connection.