master.cf

# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (no)    (never) (100)
# ==========================================================================
smtp      inet  n       -       y       -       1       postscreen
    -o smtpd_sasl_auth_enable=no
smtpd     pass  -       -       y       -       -       smtpd
dnsblog   unix  -       -       y       -       0       dnsblog
tlsproxy  unix  -       -       y       -       0       tlsproxy
submission inet n       -       y       -       -       smtpd
    -o syslog_name=postfix/submission
    -o smtpd_tls_security_level=encrypt
    -o smtpd_sasl_auth_enable=yes
    -o smtpd_sasl_type=dovecot
    -o smtpd_sasl_path=private/auth
    -o smtpd_sasl_security_options=noanonymous
    -o smtpd_client_restrictions=$mua_client_restrictions
    -o smtpd_sender_restrictions=$mua_sender_restrictions
    -o smtpd_relay_restrictions=$mua_relay_restrictions
    -o milter_macro_daemon_name=ORIGINATING
    -o smtpd_sender_login_maps=mysql:/etc/postfix/sql/sender-login-maps.cf
    -o smtpd_helo_required=no
    -o smtpd_helo_restrictions=
    -o cleanup_service_name=submission-header-cleanup
pickup    unix  n       -       y       60      1       pickup
cleanup   unix  n       -       y       -       0       cleanup
qmgr      unix  n       -       n       300     1       qmgr
tlsmgr    unix  -       -       y       1000?   1       tlsmgr
rewrite   unix  -       -       y       -       -       trivial-rewrite
bounce    unix  -       -       y       -       0       bounce
defer     unix  -       -       y       -       0       bounce
trace     unix  -       -       y       -       0       bounce
verify    unix  -       -       y       -       1       verify
flush     unix  n       -       y       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap