diff --git a/docker-compose.yml b/docker-compose.yml
index e047417..ad77545 100755
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -75,6 +75,7 @@ services:
             - ./cron/rspamd-learn:/etc/cron.d/rspamd-learn:ro
             - ${SASLAUTHD_SOCKET_FILE}:/var/run/saslauthd/mux
         environment:
+            CONTAINER_NETWORK_V4: 10.222.222.0/28
             TZ: UTC
             OVERRIDE_HOSTNAME: ${OVERRIDE_HOSTNAME}
             ENABLE_MTA_STS: "1"
@@ -364,6 +365,7 @@ networks:
         ipam:
             driver: default
             config:
+                # See: __add_to_postfix_mynetworks in user-patches
                 - subnet: 10.222.222.0/28
                   ip_range: 10.222.222.0/28
                   gateway: 10.222.222.14
diff --git a/user-patches.sh b/user-patches.sh
index 6052dd3..df3030c 100755
--- a/user-patches.sh
+++ b/user-patches.sh
@@ -29,6 +29,11 @@ printf '\nsmtpd_tls_received_header = yes\n' "localhost" >> /etc/postfix/main.cf
 sed -i '/^smtp_helo_name =/d' /etc/postfix/main.cf
 printf '\nsmtp_helo_name = %s\n' "${OVERRIDE_HOSTNAME}" >> /etc/postfix/main.cf
 
+echo "Allow this network (${CONTAINER_NETWORK_V4})"
+
+source /usr/local/bin/setup.d/networking.sh
+__add_to_postfix_mynetworks 'Container network' "${CONTAINER_NETWORK_V4}"
+
 echo 'Add spam check config'
 
 cat <<EOF > /etc/amavis/conf.d/05-domain_id
@@ -273,4 +278,7 @@ else
 	rm -fv /etc/dovecot/conf.d/10-replication.conf
 fi
 
+echo 'Chmod postfix maildrop'
+chmod 777 /var/mail-state/spool-postfix/maildrop/
+
 echo ">>>>>>>>>>>>>>>>>>>>>>>Finished applying patches<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"