diff --git a/.gitignore b/.gitignore
index 9021ead..4ecebc5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,6 @@ assets/
 templates/
 lists/
 vendor/
+*~
+filespread.ini
+*.sum
\ No newline at end of file
diff --git a/README.md b/README.md
index 5359431..6a2dede 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ npm install
 composer install
 ```
 
-Make sure you have gulp installed on your system and run
+Make sure you have gulp and the Dart SDK installed on your system and run
 
 ```
 gulp sass
@@ -24,6 +24,10 @@ gulp sass
 gulp coffee
 ```
 
+```
+gulp dart
+```
+
 Create the folders `templates`, `assets` and `lists` and make sure that the server can write in these folders.
 
 Finally remove the example files.
@@ -34,4 +38,9 @@ Filespread is licensed under the MIT license.
 
 # Contributing
 
-Please refer to the [Contributing Guidlines](https://mmk2410.org/contribute/)   
+1. Fork it
+2. Create a feature branch with a meaningful name (`git checkout -b my-new-feature`)
+3. Add yourself to the CONTRIBUTORS file
+4. Commit your changes (`git commit -am 'Add some feature'`)
+5. Push to your branch (`git push origin my-new-feature`)
+6. Create a new pull request
diff --git a/filespread.ini b/filespread.ini
index 8f74fab..f1cac2c 100644
--- a/filespread.ini
+++ b/filespread.ini
@@ -10,3 +10,6 @@ timezone = "UTC"
 email = "example@example.com"
 ; name which is given as a sender name
 name = "John"
+; reply address
+; if not set, the values above will be used
+reply = ""
\ No newline at end of file
diff --git a/gulpfile.coffee b/gulpfile.coffee
index de480a1..3ae8d4d 100755
--- a/gulpfile.coffee
+++ b/gulpfile.coffee
@@ -4,6 +4,7 @@
 gulp = require 'gulp'
 coffee = require 'gulp-coffee'
 sass = require 'gulp-sass'
+dart = require 'gulp-dart'
 
 gulp.task 'coffee', ->
   gulp.src './res/js/*.coffee'
@@ -15,6 +16,15 @@ gulp.task 'sass', ->
     .pipe sass()
     .pipe gulp.dest './res/css/'
 
+gulp.task 'dart', ->
+  gulp.src './res/dart/*.dart'
+    .pipe dart {
+      "dest": "./res/dart/",
+      "minify": "true",
+    }
+    .pipe gulp.dest './res/dart/'
+
 gulp.task 'default', ->
   gulp.watch './res/js/*.coffee', ['coffee']
   gulp.watch './res/css/*.sass', ['sass']
+  gulp.watch './res/dart/*.dart', ['dart']
diff --git a/index.html b/index.html
index 3150783..39cfabd 100755
--- a/index.html
+++ b/index.html
@@ -68,6 +68,7 @@
             <p>Change the text of the email if you want.</p>
             <p>Title:</p><input id="mailtitle" name="title" class="itextfield" />
             <p>Text:</p><textarea id="mailtext" name="text" class="itextarea"></textarea>
+	    <p><input type="checkbox" class="icheckbox" id="nofile" />Send without file</p>
             <p>Filename:</p><input id="filename" name="filename" class="itextfield" />
         </section>
 
@@ -171,5 +172,6 @@
 
         <script src="./res/js/jquery-2.1.4.min.js"></script>
         <script src="./res/js/main.js"></script>
+	    <script async src="./res/dart/main.dart.js"></script>
     </body>
 </html>
diff --git a/package.json b/package.json
index 0dd2fac..d92b6ed 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
   "devDependencies": {
     "gulp": "^3.9.1",
     "gulp-coffee": "^2.3.1",
+    "gulp-dart": "^0.2.4",
     "gulp-sass": "^2.1.0",
     "node-sass": "^3.4.2"
   },
diff --git a/res/css/main.sass b/res/css/main.sass
index 7b558c8..12df386 100755
--- a/res/css/main.sass
+++ b/res/css/main.sass
@@ -163,6 +163,12 @@ input.button
 .itextarea:focus
     @extend  .itextfield
 
+.icheckbox
+  margin: 0
+  padding: 0
+  margin-right: 10px
+  vertical-align: sub
+
 /*      FILESPREAD      */
 
 .edit_template
@@ -180,6 +186,11 @@ input.button
 .remove_list
     display: none
 
+#addresses
+  max-height: 200px
+  overflow-x: hidden
+  overflow-y: auto
+
 /*      FORM            */
 form
     margin-top: 20px
diff --git a/res/dart/.gitignore b/res/dart/.gitignore
new file mode 100644
index 0000000..2205f7b
--- /dev/null
+++ b/res/dart/.gitignore
@@ -0,0 +1,23 @@
+# Files and directories created by pub
+.packages
+.pub/
+build/
+packages
+# Remove the following pattern if you wish to check in your lock file
+pubspec.lock
+
+# Files created by dart2js
+*.dart.js
+*.part.js
+*.js.deps
+*.js.map
+*.info.json
+
+# Directory created by dartdoc
+doc/api/
+
+# JetBrains IDEs
+.idea/
+*.iml
+*.ipr
+*.iws
diff --git a/res/dart/main.dart b/res/dart/main.dart
new file mode 100644
index 0000000..0881b29
--- /dev/null
+++ b/res/dart/main.dart
@@ -0,0 +1,83 @@
+// Copyright (c) 2016 - 2017, Marcel Kapfer (mmk2410).
+// MIT License
+
+/// frontend code for filespread, a simple file over email spreading web app.
+import 'dart:convert';
+import 'dart:html';
+
+/// main method with click listners.
+void main() {
+  // send mail listener
+  querySelector("#send").onClick.listen(sendMail);
+
+  // save address list listner
+  querySelector("#save-addresses").onClick.listen(saveAddresses);
+}
+
+/// function for calling the backend to send mails.
+void sendMail(MouseEvent event) {
+  InputElement title = querySelector("#mailtitle");
+  InputElement text = querySelector("#mailtext");
+  InputElement filename = querySelector("#filename");
+  InputElement addresslist = querySelector("#address_list");
+  CheckboxInputElement nofile = querySelector("#nofile");
+
+  Map data = {
+    "title": title.value,
+    "body": text.value,
+    "filename": filename.value,
+    "list": addresslist.value,
+    "nofile": nofile.checked
+  };
+
+  String url = "res/php/sendmail.php?data=${JSON.encode(data)}";
+
+  HttpRequest.getString(url).then((String response) {
+    if (response == "0") {
+      window.alert("Mails successfully sent.");
+    } else {
+      window.alert("Failed to send mail.");
+    }
+  });
+}
+
+/// function to update the addresses list in the backend.
+void saveAddresses(MouseEvent event) {
+  TextAreaElement addresses = querySelector("#edit-addresses");
+  SelectElement list = querySelector("#edit-address-list");
+
+  List<String> addressesList = new List();
+
+  addresses.value.split("\n").forEach((String address) {
+    if (address.isNotEmpty) addressesList.add(address);
+  });
+
+  Map data = {"list": list.value, "addresses": addressesList};
+
+  String url = "res/php/savelist.php";
+
+  HttpRequest.postFormData(url, {"data": JSON.encode(data)}).then((HttpRequest response) {
+    if (response.responseText == "0") {
+      window.alert("Addresses sucessfully saved.");
+      updateAddresses(addressesList, list.value);
+    } else {
+      window.alert("Failed to save adresses.");
+    }
+  });
+}
+
+/// Updated the frontend after an address change.
+void updateAddresses(List<String> addresses, String list) {
+  SelectElement currentList = querySelector("#address_list");
+
+  if (currentList.value == list) {
+    DivElement addressesContainer = querySelector("#addresses");
+    addressesContainer.children .removeWhere((Element child) => addressesContainer.children.contains(child));
+
+    addresses.forEach((String address) {
+      ParagraphElement addressElement = new ParagraphElement();
+      addressElement.text = address;
+      addressesContainer.children.add(addressElement);
+    });
+  }
+}
diff --git a/res/js/main.coffee b/res/js/main.coffee
index 46d009f..6972938 100755
--- a/res/js/main.coffee
+++ b/res/js/main.coffee
@@ -3,16 +3,6 @@
 # MIT License
 
 main = ->
-
-  $("#send").click ->
-    url = "./res/php/sendmail.php?list=" + $("#address_list").val() +
-      "&template=" + $("#templates_list").val()
-    $.get url, (data) ->
-      if data is "0"
-        alert "Mail sent!"
-      else
-        alert "Sending mail failed!"
-
   updateAddressLists()
 
   updateTemplateLists()
@@ -115,20 +105,6 @@ main = ->
         $("#edit-addresses").val(text)
         $(".edit_address").fadeIn()
 
-  $("#save-addresses").click ->
-    data =
-      list: $("#edit-address-list").val()
-      addresses: $("#edit-addresses").val().split '\n'
-    if data.addresses[data.addresses.length - 1] is ""
-      data.addresses.pop()
-    $.get "./res/php/savelist.php", {"data": data}, (data) ->
-      if data == "0"
-        alert "List sucessfully changed!"
-        if data.list is $("#address_list")
-          updateAddresss data.list
-      else
-        alert "Error while saving the edit."
-
   $("#create-list").click ->
     filename = $("#create-list-name").val()
     if filename.substring((filename.length  - 4)) isnt ".txt"
diff --git a/res/php/savelist.php b/res/php/savelist.php
index a2f9b56..8f223e5 100644
--- a/res/php/savelist.php
+++ b/res/php/savelist.php
@@ -1,8 +1,8 @@
 <?php
-# COPYRIGHT (c) 2016 Marcel Kapfer (mmk2410)
+# COPYRIGHT (c) 2016-2017 Marcel Kapfer (mmk2410)
 # MIT License
 
-$content = $_GET["data"];
+$content = json_decode($_POST["data"], true);
 
 $filename = "../../lists/" . $content["list"];
 
diff --git a/res/php/sendmail.php b/res/php/sendmail.php
index 7f0496f..8c5e506 100755
--- a/res/php/sendmail.php
+++ b/res/php/sendmail.php
@@ -2,52 +2,87 @@
 # COPYRIGHT (c) 2016 Marcel Kapfer (mmk2410)
 # MIT License
 
+/**
+ * configuration map
+ */
 $ini = parse_ini_file("../../filespread.ini");
 
 date_default_timezone_set($ini["timezone"]);
 
 require '../../vendor/autoload.php';
 
-$list = "../../lists/" . $_GET["list"];
-$template = "../../templates/" . $_GET["template"];
+/**
+ * main function that is executed at the beginning.
+ *
+ * @author Marcel Kapfer <marcelmichaelkapfer@gmail.com>
+ * 
+ * @param $ini an configuration map.
+ */
+function main($ini) {
 
-$addresses = file($list);
-$content = file($template);
+    $data = json_decode($_GET["data"], true);
 
-$email = new PHPMailer;
+    $list = "../../lists/" . $data["list"];
+    $addresses = file($list);
 
-$email->setFrom($ini["email"], $ini["name"]);
-$email->Subject = parseSubject($content);
-$email->Body = parseText($content);
+    $content = $data["body"];
 
-foreach ($addresses as $address) {
-    $email->AddAddress($address);
-}
+    $title = $data["title"];
 
-$file_to_attach = '../../assets/file.bin';
-$filename = parseFilename($content);
+    $filename = $data["filename"];
 
-$email->AddAttachment($file_to_attach, $filename);
+    $nofile = $data["nofile"];
 
-if (!$email->Send()) {
-    echo "-1";
-    echo $email->ErrorInfo;
-} else {
-    echo "0";
-}
-
-function parseSubject($content) {
-    return substr($content[0], 7);
-}
-
-function parseFilename($content) {
-    return substr($content[1], 10);
-}
-
-function parseText($content) {
-    $text = substr($content[2], 6);
-    for ($i = 3; $i < count($content); $i++) {
-        $text = $text . $content[$i];
+    if ($nofile) {
+        $filename = "";
     }
-    return $text;
+
+    foreach ($addresses as $address) {
+        if (sendMail($title, $content, $filename, $address, $ini) != 0) {
+            print "-1";
+            exit;
+        }
+    }
+
+    print "0";
+
 }
+
+/**
+ * function for sending the mail.
+ *
+ * @author Marcel Kapfer <marcelmichaelkapfer@gmail.com>
+ * 
+ * @param $title the subject of the mail.
+ * @param $content the text of the mail.
+ * @param $address the receiver of the mail.
+ * @param $ini an configuration map.
+ */
+function sendMail($title, $content, $filename, $address, $ini) {
+
+    $mail = new PHPMailer;
+    $mail->CharSet = 'UTF-8';
+
+    $mail->setFrom($ini["email"], $ini["name"]);
+    $mail->Subject = $title;
+    $mail->Body = $content;
+
+    $mail->addAddress($address);
+
+    if (isset($ini["reply"])) {
+        $mail->addReplyTo($ini["reply"]);
+    }
+
+    if (!empty($filename)) {
+        $mail->AddAttachment("../../assets/file.bin", $filename);
+    }
+    
+    if (!$mail->Send()) {
+        return -1;
+    } else {
+        return 0;
+    }
+     
+}
+
+main($ini);