From: Matt Hayes on
I've been watching this for a while and still not sure what could be
causing it it or if its a known issue, but thought I'd pass it along
here on the mailing list to see whatever one else thought.

I use recipient_bcc_maps to bcc email to my personal account to Gmail.

recipient_bcc contents:
-----------------------

dominian(a)slackadelic.com dominian(a)gmail.com


postconf -n output:
-------------------

alias_database = hash:/etc/postfix/aliases
alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
broken_sasl_auth_clients = yes
command_directory = /usr/sbin/
config_directory = /etc/postfix
content_filter = amavisfeed:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
disable_vrfy_command = yes
fast_flush_domains = $relay_domains
html_directory = no
mail_owner = postfix
mailq_path = /usr/sbin/mailq
manpage_directory = /usr/man
mydomain = slackadelic.com
myhostname = mail.slackadelic.com
mynetworks = 216.23.240.160, 74.207.254.75, 127.0.0.0/8
myorigin = $mydomain
newaliases_path = /usr/sbin/newaliases
postscreen_dnsbl_action = drop
postscreen_dnsbl_sites = bl.ipv6.spameatingmonkey.net,
bl.spameatingmonkey.net, zen.spamhaus.org
postscreen_greet_action = drop
postscreen_hangup_action = drop
queue_directory = /var/spool/postfix
readme_directory = no
recipient_bcc_maps = hash:/etc/postfix/recipient_bcc
recipient_delimiter = +
relay_domains = mysql:/etc/postfix/mysql_virtual_relay_domains_maps.cf
relay_recipient_maps =
hash:/etc/postfix/slamd64_relay_recipients,hash:/etc/postfix/twister_relay_recipients
sample_directory = /etc/postfix/sample
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_data_restrictions = permit_mynetworks, reject_unauth_pipelining
smtpd_delay_reject = no
smtpd_etrn_restrictions = permit_mynetworks, reject
smtpd_helo_required = yes
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated, reject_unknown_client_hostname,
reject_unknown_sender_domain, reject_unauth_destination,
reject_unauth_pipelining, check_policy_service unix:private/spf,
check_helo_access hash:/etc/postfix/helo_access,
reject_non_fqdn_helo_hostname, reject_non_fqdn_sender,
reject_non_fqdn_recipient, reject_invalid_helo_hostname,
warn_if_reject reject_rbl_client 3625447584.geobl.spameatingmonkey.net,
warn_if_reject reject_rhsbl_sender dsn.rfc-ignorant.org,
reject_rbl_client bl.ipv6.spameatingmonkey.net, reject_rbl_client
bl.spameatingmonkey.net, reject_rbl_client zen.spamhaus.org
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_starttls_timeout = 60s
smtpd_tls_ccert_verifydepth = 1
smtpd_tls_cert_file = /etc/ssl/imap/mail.slackadelic.com.pem
smtpd_tls_key_file = /etc/ssl/imap/private/mail.slackadelic.com.key
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_timeout = 3600s
soft_bounce = no
tls_random_source = dev:/dev/urandom
transport_maps = hash:/etc/postfix/transport
unknown_client_reject_code = 554
unknown_local_recipient_reject_code = 550
virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
virtual_gid_maps = static:94
virtual_mailbox_base = /var/mail/virtual
virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
virtual_mailbox_limit = 51200000
virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_minimum_uid = 94
virtual_transport = virtual
virtual_uid_maps = static:94


Relevant logs to the issue:
---------------------------

http://pastebin.slackadelic.com/p/VUgFOC21.html Look at lines
25,26,27,28 as they are where the duplicate log entries are at.

Definitely could be something with my setup, but this is the only time I
see the duplicate is when the bcc map sends the email off-site.


-Matt