Sorry, forgot the mentioned (naive) patch.
*** /usr/share/postfix/master.cf.dist 2014-11-04 06:32:45.000000000 +0000
--- /usr/share/postfix/master.cf.dist.new 2015-12-28 17:05:02.943415617 +0000
*************** smtp inet n - -
*** 19,24 ****
--- 19,25 ----
# -o smtpd_tls_security_level=encrypt
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
+ # -o smtpd_milters=$mua_milters
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
*************** smtp inet n - -
*** 30,35 ****
--- 31,37 ----
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
+ # -o smtpd_milters=$mua_milters
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
