diff --git a/Makefile b/Makefile
index 5f4c5cd..8adf42f 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ all: build
 volume:
 	echo "Building $(APPNAME) volumes..."
 	sudo docker run \
-		-v $(PWD)/src:/go/src/github.com/$(USERNAME)/$(APPNAME) \
+		-v $(PWD)/src:/go/src/$(ROOTPKG)/$(APPNAME) \
 		-v $(PWD)/scripts:/var/opt/$(APPNAME)/scripts \
 		--name $(APPNAME)_volumes busybox true
 
diff --git a/etc/env_sample.conf b/etc/env_sample.conf
index 7061ef2..7cb2b85 100644
--- a/etc/env_sample.conf
+++ b/etc/env_sample.conf
@@ -1,20 +1,45 @@
 ###
-# webhook environment configuration
+# Webhookd configuration.
 ###
 
-# Domain name
-# This is only used by the reverse proxy container (not by the app).
-DOMAIN_NAME=webhook.lan
-
-# Working directory
+# Working directory.
+# Defaults: /tmp
 APP_WORKING_DIR=/var/opt/webhookd/work
 
-# Scripts directory
+# Scripts directory.
+# Defaults: ./scripts
 APP_SCRIPTS_DIR=/var/opt/webhookd/scripts
 
-# Notifier
-# "http" or "smtp"
+# Redirect scripts output in the console.
+# Warning: Only for debugging purpose.
+# Defaults: false
+APP_SCRIPTS_DEBUG=false
+
+# Notifier.
+# Notify script execution result and logs.
+# Values:
+#   - "http": Send notification with an HTTP hook (compatible with Mailgun API).
+#   - "smtp": Send notification by mail.
+#   - "": No notification (defaults).
 APP_NOTIFIER=http
 
-# HTTP notifier URL
+# Notifier FROM directive.
+# Defaults: "webhookd <noreply@nunux.org>"
+APP_NOTIFIER_FROM=Mailgun Sandbox <postmaster@sandboxdexxxxxxxxxxxxxxxxxx.mailgun.org>
+
+# Notifier TO directive.
+# Defaults: "hostmaster@nunux.org"
+APP_NOTIFIER_TO=foo@bar.org
+
+# HTTP notifier URL.
 APP_HTTP_NOTIFIER_URL=http://requestb.in/1gd3ond1
+#APP_HTTP_NOTIFIER_URL=https://api.mailgun.net/v2/sandboxdexxxxxxxxxxxxxxxxx.mailgun.org/messages
+
+# HTTP notifier user:password.
+APP_HTTP_NOTIFIER_USER=api:key-xxxxxxxxxxxxxxxxxxxxxxxxxx
+
+# SMTP notifier host.
+# Defaults: localhost:25
+APP_SMTP_NOTIFIER_HOST=localhost:25
+
+
diff --git a/src/worker/script_runner.go b/src/worker/script_runner.go
index f6c04d1..bf2ea57 100644
--- a/src/worker/script_runner.go
+++ b/src/worker/script_runner.go
@@ -2,6 +2,7 @@ package worker
 
 import (
 	"fmt"
+	"io"
 	"os"
 	"os/exec"
 	"path"
@@ -10,6 +11,7 @@ import (
 var (
 	workingdir = os.Getenv("APP_WORKING_DIR")
 	scriptsdir = os.Getenv("APP_SCRIPTS_DIR")
+	scriptsdebug = os.Getenv("APP_SCRIPTS_DEBUG")
 )
 
 func RunScript(work *WorkRequest) (string, error) {
@@ -34,8 +36,14 @@ func RunScript(work *WorkRequest) (string, error) {
 	}
 
 	defer outfile.Close()
-	cmd.Stdout = outfile
-	cmd.Stderr = outfile
+	if scriptsdebug == "true" {
+		fmt.Println("Logging in console: ", scriptsdebug)
+		cmd.Stdout = io.MultiWriter(os.Stdout, outfile)
+		cmd.Stderr = io.MultiWriter(os.Stderr, outfile)
+	} else {
+		cmd.Stdout = outfile
+		cmd.Stderr = outfile
+	}
 
 	err = cmd.Start()
 	if err != nil {