null host address bits

postfix complaines about non-null host address bits in mynetworks

docker-setup.sh

@@ -9,7 +9,7 @@ function setup_conf_and_secret {
     postconf -e 'smtp_sasl_password_maps = hash:/etc/postfix/relay_passwd'
     postconf -e 'smtp_sasl_security_options = noanonymous'
     postconf -e 'smtp_tls_security_level = encrypt'
-    postconf -e 'mynetworks = 127.0.0.0/8 172.16.0.0/12 10.42.0.0/8'
+    postconf -e 'mynetworks = 127.0.0.0/8 172.16.0.0/12 10.0.0.0/8'
 
     echo "$MTP_RELAY   $MTP_USER:$MTP_PASS" > /etc/postfix/relay_passwd
     postmap /etc/postfix/relay_passwd