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Okay I am now down to maybe 5 emails per 24 hours that are backscatter
bounces from existing mail names.

Can anyone see anything wrong here please?  From reading I need to use
header and body checks?  ( How do I block backscatter mail to real
recipient addresses?
<http://www.postfix.org/BACKSCATTER_README.html#real> ), but am unsure
what to use in the code.  Can someone help come up with some header
and body check rules if I supply some real email headers?  Just I am
truly guessing what to do and that will no doubt kill real emails by
the train load!

Many thanks!

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases, hash:/var/spool/postfix/plesk/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
html_directory = no
inet_interfaces = all
inet_protocols = all
local_recipient_maps = $virtual_mailbox_maps
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
message_size_limit = 10240000
mydestination = $myhostname, localhost.$mydomain, localhost
myhostname = server.idb.com.au
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.5.6/README_FILES
sample_directory = /usr/share/doc/postfix-2.5.6/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp_send_xforward_command = yes
smtp_use_tls = yes
smtpd_authorized_xforward_hosts = 127.0.0.0/8
smtpd_client_restrictions = reject_rbl_client bl.spamcop.net,
reject_rbl_client sbl-xbl.spamhaus.org
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sender_restrictions = check_sender_access
hash:/var/spool/postfix/plesk/blacklists, reject_non_fqdn_sender,
reject_unauthenticated_sender_login_mismatch
smtpd_tls_cert_file = /etc/postfix/postfix_default.pem
smtpd_tls_key_file = $smtpd_tls_cert_file
smtpd_tls_security_level = may
smtpd_use_tls = yes
transport_maps = hash:/var/spool/postfix/plesk/transport
unknown_local_recipient_reject_code = 550
virtual_alias_maps = $virtual_maps, hash:/var/spool/postfix/plesk/virtual
virtual_gid_maps = static:31
virtual_mailbox_base = /var/qmail/mailnames
virtual_mailbox_domains = $virtual_mailbox_maps,
hash:/var/spool/postfix/plesk/virtual_domains
virtual_mailbox_maps = hash:/var/spool/postfix/plesk/vmailbox
virtual_transport = plesk_virtual
virtual_uid_maps = static:110
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begin:vcard
fn:David Cottle
n:Cottle;David
email;internet:webmas...@aus-city.com
title:Webmaster
version:2.1
end:vcard

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