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: ----------------------- domin...@slackadelic.com domin...@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
