Merge pull request #41 from j3k0/master

Add BIND_IP and BIND_IP6 env vars

README.md

@@ -13,6 +13,8 @@ The container accepts `MAILNAME` environment variable which will set the outgoin
 
 The container also accepts the `PORT` environment variable, to set the port the mail daemon will listen on inside the container. The default port is `25`.
 
+To configure the binding address, you can use `BIND_IP` and `BIND_IP6` environment variables. The default `BIND_IP` is `0.0.0.0`. The default `BIND_IP6` is `::0`.
+
 To disable IPV6 you can set the `DISABLE_IPV6` environment variable to any value.
 
 The container accepts `OTHER_HOSTNAMES` environment variable which will set the list of domains for which this machine should consider itself the final destination.

entrypoint.sh

@@ -24,7 +24,7 @@ if [ "$KEY_PATH" -a "$CERTIFICATE_PATH" ]; then
 fi
 
 opts=(
-	dc_local_interfaces "[0.0.0.0]:${PORT:-25} ; [::0]:${PORT:-25}"
+	dc_local_interfaces "[${BIND_IP:-0.0.0.0}]:${PORT:-25} ; [${BIND_IP6:-::0}]:${PORT:-25}"
 	dc_other_hostnames "${OTHER_HOSTNAMES}"
 	dc_relay_nets "$(ip addr show dev eth0 | awk '$1 == "inet" { print $2 }' | xargs | sed 's/ /:/g')${RELAY_NETWORKS}"
 )