# postconf -Mf
smtpd      pass  -       -       n       -       -       smtpd
    -o smtpd_tls_cert_file=/etc/ssl/private/mail.example.us.crt
    -o smtpd_tls_key_file=/etc/ssl/private/mail.example.us.key
dnsblog    unix  -       -       -       -       0       dnsblog
tlsproxy   unix  -       -       -       -       0       tlsproxy
mail.example.us:smtp inet n -    -       -       1       postscreen
    -o soft_bounce=yes
mail.example.us:submission inet n - -    -       -       smtpd
    -o smtpd_tls_cert_file=/etc/ssl/private/mail.example.us.crt
    -o smtpd_tls_key_file=/etc/ssl/private/mail.example.us.key
mail.example.net:submission inet n - - -      -       smtpd
    -o smtpd_tls_cert_file=/etc/ssl/private/mail.example.net.crt
    -o smtpd_tls_key_file=/etc/ssl/private/mail.example.net.key
spamassassin unix -      n       n       -       -       pipe user=vmail
    argv=/usr/bin/spamc -f -e /usr/lib/dovecot/dovecot-lda -f ${sender} -a
    ${user}@${nexthop}
pickup     unix  n       -       -       60      1       pickup
cleanup    unix  n       -       -       -       0       cleanup
qmgr       unix  n       -       n       300     1       qmgr
tlsmgr     unix  -       -       -       1000?   1       tlsmgr
rewrite    unix  -       -       -       -       -       trivial-rewrite
bounce     unix  -       -       -       -       0       bounce
defer      unix  -       -       -       -       0       bounce
trace      unix  -       -       -       -       0       bounce
verify     unix  -       -       -       -       1       verify
flush      unix  n       -       -       1000?   0       flush
proxymap   unix  -       -       n       -       -       proxymap
proxywrite unix  -       -       n       -       1       proxymap
smtp       unix  -       -       -       -       -       smtp
relay      unix  -       -       -       -       -       smtp
showq      unix  n       -       -       -       -       showq
error      unix  -       -       -       -       -       error
retry      unix  -       -       -       -       -       error
discard    unix  -       -       -       -       -       discard
local      unix  -       n       n       -       -       local
virtual    unix  -       n       n       -       -       virtual
lmtp       unix  -       -       -       -       -       lmtp
anvil      unix  -       -       -       -       1       anvil
scache     unix  -       -       -       -       1       scache
maildrop   unix  -       n       n       -       -       pipe flags=DRhu
    user=vmail argv=/usr/bin/maildrop -d ${recipient}
uucp       unix  -       n       n       -       -       pipe flags=Fqhu
    user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail     unix  -       n       n       -       -       pipe flags=F user=ftn
    argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp      unix  -       n       n       -       -       pipe flags=Fq.
    user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n       n       -       2       pipe flags=R
    user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop}
    ${user} ${extension}
mailman    unix  -       n       n       -       -       pipe flags=FR
    user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop}
    ${user}

# postconf -nf
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
inet_interfaces = all
local_recipient_maps = $virtual_mailbox_maps
local_transport = virtual
mailbox_size_limit = 0
milter_default_action = accept
milter_protocol = 2
mydestination = localhost
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
non_smtpd_milters = inet:localhost:8891
postscreen_dnsbl_action = enforce
postscreen_dnsbl_sites = zen.spamhaus.org*3 b.barracudacentral.org*2
    bl.spameatingmonkey.net*2 bl.spamcop.net
postscreen_dnsbl_threshold = 2
postscreen_greet_action = enforce
readme_directory = no
recipient_delimiter = +
relay_domains = $mydestination
smtp_tls_loglevel = 1
smtp_tls_security_level = may
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_milters = inet:localhost:8891
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated,
    reject_unauth_destination
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated,
    reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $mydomain
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_tls_security_options = $smtpd_sasl_security_options
smtpd_sasl_type = dovecot
smtpd_tls_auth_only = yes
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
virtual_alias_maps = proxy:mysql:/etc/postfix/virtual_alias_maps.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains = proxy:mysql:/etc/postfix/virtual_mailbox_domains.cf
virtual_mailbox_limit = 512000000
virtual_mailbox_maps = proxy:mysql:/etc/postfix/virtual_mailbox_maps.cf
virtual_minimum_uid = 5000
virtual_transport = virtual
virtual_uid_maps = static:5000