diff --git a/Dockerfile b/Dockerfile
index e7026e3..e8e1684 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,10 +3,11 @@ LABEL maintainer "Mauro Torrez <mauro@mau.ro>"
 ARG DEBIAN_FRONTEND=noninteractive
 ENV LC_ALL C
 
-ENV MYDESTINATION='localhost.localdomain, localhost'
+ENV MYDESTINATION="localhost.localdomain, localhost"
 ENV MYHOSTNAME=mail.example.com
 ENV MYDOMAIN=example.com
-ENV MYNETWORKS='127.0.0.0/8, [::ffff:127.0.0.0]/104, [::1]/128'
+ENV MYNETWORKS=""
+ENV MYNETWORKS_STYLE=class
 ENV VIRTUAL_ALIAS_MAPS=
 ENV VIRTUAL_MAILBOX_MAPS=
 ENV VIRTUAL_TRANSPORT=lmtp:dovecot:24
@@ -20,7 +21,7 @@ ENV SMTP_TLS_SECURITY_LEVEL=may
 ENV SMTPD_TLS_SECURITY_LEVEL=may
 ENV SMTPD_TLS_AUTH_ONLY=no
 ENV SMTPD_TLS_SESSION_CACHE_DATABASE="btree:\${data_directory}/smtpd_scache"
-ENV SMTPD_CLIENT_RESTRICTIONS="check_client_access pcre:/etc/postfix/rules/client_access_list, permit_sasl_authenticated, permit_mynetworks, reject_unknown_client_hostname, reject_unauth_pipelining, permit"
+ENV SMTPD_CLIENT_RESTRICTIONS="check_client_access pcre:/etc/postfix/rules/client_access_list, permit_sasl_authenticated, permit_mynetworks, reject_unknown_client_hostname, reject_unauth_pipelining, reject"
 ENV SMTPD_DATA_RESTRICTIONS="reject_unauth_pipelining, permit"
 ENV SMTPD_HELO_RESTRICTIONS="check_helo_access hash:/etc/postfix/rules/helo_access_list, permit_mynetworks, reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, warn_if_reject, permit"
 ENV SMTPD_RELAY_RESTRICTIONS="permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, permit"
diff --git a/confd/conf.d/setup_main.toml b/confd/conf.d/setup_main.toml
index c3f188e..e8c0822 100644
--- a/confd/conf.d/setup_main.toml
+++ b/confd/conf.d/setup_main.toml
@@ -7,6 +7,7 @@ keys = [
 "/myhostname",
 "/mydomain",
 "/mynetworks",
+"/mynetworks/style",
 "/virtual/alias/maps",
 "/virtual/mailbox/maps",
 "/virtual/transport",
diff --git a/confd/templates/setup_main.tmpl b/confd/templates/setup_main.tmpl
index ae36d9b..1c44d49 100644
--- a/confd/templates/setup_main.tmpl
+++ b/confd/templates/setup_main.tmpl
@@ -36,6 +36,7 @@ postconf maillog_file=/dev/stdout
 {{ with getv "/myhostname" }}postconf myhostname='{{.}}'{{ end }}
 {{ with getv "/mydomain" }}postconf mydomain='{{.}}'{{ end }}
 {{ with getv "/mynetworks" }}postconf mynetworks='{{.}}'{{ end }}
+{{ with getv "/mynetworks/style" }}postconf mynetworks_style='{{.}}'{{ end }}
 {{ with getv "/virtual/alias/maps" }}postconf virtual_alias_maps='{{.}}'{{ end }}
 {{ with getv "/virtual/mailbox/maps" }}postconf virtual_mailbox_maps='{{.}}'{{ end }}
 {{ with getv "/virtual/transport" }}postconf virtual_transport='{{.}}'{{ end }}