diff --git a/assets/css/src/progress_bar.styl b/assets/css/src/progress_bar.styl
index f2fcb5b03f..b711fca67c 100644
--- a/assets/css/src/progress_bar.styl
+++ b/assets/css/src/progress_bar.styl
@@ -5,17 +5,25 @@
   width: 100%
   margin: 0
   border-radius: 5px
+  position: relative
 
-.mailpoet_progress span
+.mailpoet_progress_label
+  position: absolute
+  width: 100%
+  text-align: center
+  display: inline-block
+  margin: 2px 0 0 0
+
+.mailpoet_progress_bar
+  position: absolute
   display: inline-block
   height: 100%
   border-radius: 3px
   box-shadow: 0 1px 0 rgba(255, 255, 255, .5) inset
-
-.blue span
   background-color: #34c2e3
   background-image: linear-gradient(top, #34c2e3, darken(#34c2e3, 20%))
 
-.orange span
-  background-color: #fecf23
-  background-image: linear-gradient(top, #fecf23, #fd9215)
\ No newline at end of file
+.mailpoet_progress_complete
+  .mailpoet_progress_bar
+    background-color: #fecf23
+    background-image: linear-gradient(top, #fecf23, #fd9215)
\ No newline at end of file
diff --git a/assets/js/src/form/fields/text.jsx b/assets/js/src/form/fields/text.jsx
index 825209d77c..04fac47d08 100644
--- a/assets/js/src/form/fields/text.jsx
+++ b/assets/js/src/form/fields/text.jsx
@@ -20,7 +20,9 @@ function(
           value={ this.props.item[this.props.field.name] }
           placeholder={ this.props.field.placeholder }
           defaultValue={ this.props.field.defaultValue }
-          onChange={ this.props.onValueChange } />
+          onChange={ this.props.onValueChange }
+          {...this.props.field.validation}
+        />
       );
     }
   });
diff --git a/assets/js/src/listing/listing.jsx b/assets/js/src/listing/listing.jsx
index d7495133b1..a74d42ed2c 100644
--- a/assets/js/src/listing/listing.jsx
+++ b/assets/js/src/listing/listing.jsx
@@ -397,6 +397,12 @@ define(
         if(this.isMounted()) {
           const params = this.props.params || {}
           this.initWithParams(params)
+
+          if(this.props.auto_refresh) {
+            jQuery(document).on('heartbeat-tick.mailpoet', function(e, data) {
+              this.getItems();
+            }.bind(this));
+          }
         }
       },
       componentWillReceiveProps: function(nextProps) {
diff --git a/assets/js/src/newsletters/list.jsx b/assets/js/src/newsletters/list.jsx
index 00f6ac0936..1accdd3ba0 100644
--- a/assets/js/src/newsletters/list.jsx
+++ b/assets/js/src/newsletters/list.jsx
@@ -123,23 +123,89 @@ define(
     ];
 
     var NewsletterList = React.createClass({
+      pauseSending: function(item) {
+        MailPoet.Ajax.post({
+          endpoint: 'sendingQueue',
+          action: 'pause',
+          data: item.id
+        }).done(function() {
+          jQuery('#resume_'+item.id).show();
+          jQuery('#pause_'+item.id).hide();
+        });
+      },
+      resumeSending: function(item) {
+        MailPoet.Ajax.post({
+          endpoint: 'sendingQueue',
+          action: 'resume',
+          data: item.id
+        }).done(function() {
+          jQuery('#pause_'+item.id).show();
+          jQuery('#resume_'+item.id).hide();
+        });
+      },
       renderStatus: function(item) {
         if(item.queue === null) {
           return (
             <span>Not sent yet.</span>
           );
         } else {
+          var progressClasses = classNames(
+            'mailpoet_progress',
+            { 'mailpoet_progress_complete': item.queue.status === 'completed'}
+          );
+
           // calculate percentage done
           var percentage = Math.round(
             (item.queue.count_processed * 100) / (item.queue.count_total)
           );
 
+          var label = false;
+
+          if(item.queue.status === 'completed') {
+            label = (
+              <span>
+                Sent to {
+                  item.queue.count_processed - item.queue.count_failed
+                } out of { item.queue.count_total }.
+              </span>
+            );
+          } else {
+            label = (
+              <span>
+                { item.queue.count_processed } / { item.queue.count_total }
+                &nbsp;&nbsp;
+                <a
+                  id={ 'resume_'+item.id }
+                  className="button"
+                  style={{ display: (item.queue.status === 'paused') ? 'inline-block': 'none' }}
+                  href="javascript:;"
+                  onClick={ this.resumeSending.bind(null, item) }
+                >Resume</a>
+                <a
+                  id={ 'pause_'+item.id }
+                  className="button mailpoet_pause"
+                  style={{ display: (item.queue.status === null) ? 'inline-block': 'none' }}
+                  href="javascript:;"
+                  onClick={ this.pauseSending.bind(null, item) }
+                >Pause</a>
+              </span>
+            );
+          }
+
           return (
             <div>
-              <div className="mailpoet_progress blue">
-                  <span style={ { width: percentage + "%"} }></span>
+              <div className={ progressClasses }>
+                  <span
+                    className="mailpoet_progress_bar"
+                    style={ { width: percentage + "%"} }
+                  ></span>
+                  <span className="mailpoet_progress_label">
+                    { percentage + "%" }
+                  </span>
               </div>
-              { item.queue.count_processed } / { item.queue.count_total }
+              <p style={{ textAlign:'center' }}>
+                { label }
+              </p>
             </div>
           );
         }
@@ -194,7 +260,8 @@ define(
               columns={columns}
               bulk_actions={ bulk_actions }
               item_actions={ item_actions }
-              messages={ messages } />
+              messages={ messages }
+              auto_refresh={ true } />
           </div>
         );
       }
diff --git a/assets/js/src/newsletters/send.jsx b/assets/js/src/newsletters/send.jsx
index d4476481f7..0c9bcbc2d1 100644
--- a/assets/js/src/newsletters/send.jsx
+++ b/assets/js/src/newsletters/send.jsx
@@ -48,14 +48,21 @@ define(
             name: 'from_name',
             type: 'text',
             placeholder: 'John Doe',
-            defaultValue: settings.from_name
+            defaultValue: (settings.sender !== undefined) ? settings.sender.name : '',
+            validation: {
+              'data-parsley-required': true
+            }
           },
           {
             name: 'from_email',
             type: 'text',
             placeholder: 'john.doe@email.com',
-            defaultValue: settings.from_address
-          },
+            defaultValue: (settings.sender !== undefined) ? settings.sender.address : '',
+            validation: {
+              'data-parsley-required': true,
+              'data-parsley-type': 'email'
+            }
+          }
         ]
       },
       {
@@ -93,33 +100,40 @@ define(
         Router.History
       ],
       handleSend: function() {
-        MailPoet.Ajax.post({
-          endpoint: 'sendingQueue',
-          action: 'addQueue',
-          data: {
-            newsletter_id: this.props.params.id,
-            segments: jQuery('#mailpoet_segments').val()
-          }
-        }).done(function(response) {
-          if(response === true) {
-            //this.history.pushState(null, '/');
+        if(jQuery('#mailpoet_newsletter').parsley().validate() === true) {
+          MailPoet.Ajax.post({
+            endpoint: 'sendingQueue',
+            action: 'add',
+            data: {
+              newsletter_id: this.props.params.id,
+              segments: jQuery('#mailpoet_segments').val()
+            }
+          }).done(function(response) {
+            if(response.result === true) {
+              this.history.pushState(null, '/');
 
-            MailPoet.Notice.success(
-              'The newsletter has been sent!'
-            );
-          } else {
-            if(response.errors) {
-              MailPoet.Notice.error(
-                response.errors.join("<br />")
+              MailPoet.Notice.success(
+                'The newsletter is being sent...'
               );
             } else {
-              MailPoet.Notice.error(
-                'An error occurred while trying to send. '+
-                '<a href="?page=mailpoet-settings">Check your settings.</a>'
-              );
+              if(response.errors) {
+                MailPoet.Notice.error(
+                  response.errors.join("<br />")
+                );
+              } else {
+                MailPoet.Notice.error(
+                  'An error occurred while trying to send. '+
+                  '<a href="?page=mailpoet-settings">Check your settings.</a>'
+                );
+              }
             }
-          }
-        }.bind(this));
+          }.bind(this));
+        }
+      },
+      componentDidMount: function() {
+        if(this.isMounted()) {
+          jQuery('#mailpoet_newsletter').parsley();
+        }
       },
       render: function() {
         return (
diff --git a/assets/js/src/settings/tabs.js b/assets/js/src/settings/tabs.js
index a81318cd00..860581c9c4 100644
--- a/assets/js/src/settings/tabs.js
+++ b/assets/js/src/settings/tabs.js
@@ -36,7 +36,7 @@ define(
         } else {
           // hide DKIM option when using MailPoet's API
           jQuery('#mailpoet_mta_dkim')[
-            (method === 'mailpoet')
+            (method === 'MailPoet')
             ? 'hide'
             : 'show'
           ]();
diff --git a/lib/Config/Menu.php b/lib/Config/Menu.php
index b20a0696b8..1d0aaac4e5 100644
--- a/lib/Config/Menu.php
+++ b/lib/Config/Menu.php
@@ -320,20 +320,27 @@ class Menu {
   }
 
   function newsletters() {
+    add_filter('heartbeat_received', array($this, 'getQueueStatus'), 10, 3);
+
     global $wp_roles;
 
     $data = array();
 
     $data['segments'] = Segment::findArray();
-    $settings = Setting::findArray();
-    $data['settings'] = array();
-    foreach ($settings as $setting) {
-      $data['settings'][$setting['name']] = $setting['value'];
-    }
+    $data['settings'] = Setting::getAll();
     $data['roles'] = $wp_roles->get_names();
     echo $this->renderer->render('newsletters.html', $data);
   }
 
+  function getQueueStatus($response, $data, $screen_id) {
+    if(isset($data['mailpoet'])) {
+        $response['mailpoet'] = array(
+            'hello' => 'world'
+        );
+    }
+    return $response;
+  }
+
   function newletterEditor() {
     $data = array();
     wp_enqueue_media();
@@ -364,7 +371,7 @@ class Menu {
     $data = array(
       'form' => $form,
       'pages' => Pages::getAll(),
-      'segments' => Segment::getPublished()
+      'segments' => Segment::getPublic()
         ->findArray(),
       'styles' => FormRenderer::getStyles($form),
       'date_types' => Block\Date::getDateTypes(),
diff --git a/lib/Models/Newsletter.php b/lib/Models/Newsletter.php
index 09ef11774e..02135b6adb 100644
--- a/lib/Models/Newsletter.php
+++ b/lib/Models/Newsletter.php
@@ -43,6 +43,12 @@ class Newsletter extends Model {
     )->select_expr(MP_NEWSLETTER_OPTION_TABLE.'.value');
   }
 
+  function getQueue() {
+    return SendingQueue::where('newsletter_id', $this->id)
+      ->orderByDesc('updated_at')
+      ->findOne();
+  }
+
   static function search($orm, $search = '') {
     return $orm->where_like('subject', '%' . $search . '%');
   }
diff --git a/lib/Models/SendingQueue.php b/lib/Models/SendingQueue.php
index d1c9762132..9a5bcf405b 100644
--- a/lib/Models/SendingQueue.php
+++ b/lib/Models/SendingQueue.php
@@ -9,4 +9,27 @@ class SendingQueue extends Model {
   function __construct() {
     parent::__construct();
   }
+
+  function pause() {
+    if($this->count_processed === $this->count_total) {
+      return false;
+    } else {
+      $this->set('status', 'paused');
+      return $this->save();
+    }
+  }
+
+  function resume() {
+    if($this->count_processed === $this->count_total) {
+      return $this->complete();
+    } else {
+      $this->set_expr('status', 'NULL');
+      return $this->save();
+    }
+  }
+
+  function complete() {
+    $this->set('status', 'completed');
+    return $this->save();
+  }
 }
\ No newline at end of file
diff --git a/lib/Router/Queue.php b/lib/Router/Queue.php
index 4a2ae14b3b..c20eacd7f7 100644
--- a/lib/Router/Queue.php
+++ b/lib/Router/Queue.php
@@ -92,6 +92,8 @@ class Queue {
     );
   }
 
+
+
   function addQueues($data) {
     $result = array_map(function ($queueData) {
       $queue = SendingQueue::create();
diff --git a/lib/Router/SendingQueue.php b/lib/Router/SendingQueue.php
index 2cb67e0c89..6f493a0b5c 100644
--- a/lib/Router/SendingQueue.php
+++ b/lib/Router/SendingQueue.php
@@ -1,13 +1,14 @@
 <?php
 namespace MailPoet\Router;
 
+use MailPoet\Models\Newsletter;
 use MailPoet\Models\Segment;
 use MailPoet\Util\Helpers;
 
 if(!defined('ABSPATH')) exit;
 
 class SendingQueue {
-  function addQueue($data) {
+  function add($data) {
     $queue = \MailPoet\Models\SendingQueue::where('newsletter_id', $data['newsletter_id'])
       ->whereNull('status')
       ->findArray();
@@ -18,6 +19,7 @@ class SendingQueue {
           'errors' => array(__('Send operation is already in progress.'))
         )
       );
+      exit;
     }
     $queue = \MailPoet\Models\SendingQueue::create();
     $queue->newsletter_id = $data['newsletter_id'];
@@ -39,18 +41,60 @@ class SendingQueue {
       )
     );
     $queue->count_total = $queue->count_to_process = count($subscriber_ids);
-    $queue->save();
-    wp_send_json(
-      !$queue->save() ?
+    $result = $queue->save();
+    if($result === false) {
+      $errors = array(__('Queue could not be created.'));
+
+      if(!empty($queue->getValidationErrors())) {
+        $errors = array_merge($errors, $queue->getValidationErrors());
+      }
+
+      wp_send_json(
         array(
           'result' => false,
-          'errors' => array(__('Queue could not be created.'))
-        ) :
+          'errors' => $errors
+        )
+      );
+    } else {
+      wp_send_json(
         array(
           'result' => true,
           'data' => array($queue->id)
         )
-    );
+      );
+    }
+  }
+
+  function pause($newsletter_id) {
+    $newsletter = Newsletter::findOne($newsletter_id);
+    $result = false;
+
+    if($newsletter !== false) {
+      $queue = $newsletter->getQueue();
+      if($queue !== false && $queue->id() > 0) {
+        $result = $queue->pause();
+      }
+    }
+
+    wp_send_json(array(
+      'result' => $result
+    ));
+  }
+
+  function resume($newsletter_id) {
+    $newsletter = Newsletter::findOne($newsletter_id);
+    $result = false;
+
+    if($newsletter !== false) {
+      $queue = $newsletter->getQueue();
+      if($queue !== false && $queue->id() > 0) {
+        $result = $queue->resume();
+      }
+    }
+
+    wp_send_json(array(
+      'result' => $result
+    ));
   }
 
   function addQueues($data) {
diff --git a/lib/Settings/Hosts.php b/lib/Settings/Hosts.php
index 95264d047c..fc9d125543 100644
--- a/lib/Settings/Hosts.php
+++ b/lib/Settings/Hosts.php
@@ -3,25 +3,25 @@ namespace MailPoet\Settings;
 
 class Hosts {
   private static $_smtp = array(
-    'amazon' => array(
+    'AmazonSES' => array(
       'name' => 'Amazon SES',
       'api' => false,
       'emails' => 100,
       'interval' => 5
     ),
-    'elasticemail' => array(
+    'ElasticEmail' => array(
       'name' => 'ElasticEmail',
       'api' => true,
       'emails' => 100,
       'interval' => 5
     ),
-    'mailgun' => array(
+    'MailGun' => array(
       'name' => 'MailGun',
       'api' => false,
       'emails' => 100,
       'interval' => 5
     ),
-    'sendgrid' => array(
+    'SendGrid' => array(
       'name' => 'SendGrid',
       'api' => true,
       'emails' => 100,
diff --git a/package.json b/package.json
index d90d3231b0..9a2955db2e 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "moment": "^2.10.3",
     "napa": "^1.2.0",
     "papaparse": "4.1.1",
-    "parsley": "^0.1.0",
+    "parsleyjs": "^2.1.2",
     "react": "^0.14.1",
     "react-checkbox-group": "0.2.2",
     "react-dom": "^0.14.1",
diff --git a/views/settings/mta.html b/views/settings/mta.html
index 426b00197c..cca8431a19 100644
--- a/views/settings/mta.html
+++ b/views/settings/mta.html
@@ -17,6 +17,7 @@
   name="mta[method]"
   value="<%= settings.mta.method %>"
 />
+
 <!-- mta: sending frequency -->
 <input
   type="hidden"
@@ -51,8 +52,8 @@
 <!-- smtp: available sending methods -->
 <ul class="mailpoet_sending_methods clearfix">
   <li
-    data-method="mailpoet"
-    <% if(settings.mta.method == 'mailpoet') %>class="mailpoet_active"<% endif %>
+    data-method="MailPoet"
+    <% if(settings.mta.method == 'MailPoet') %>class="mailpoet_active"<% endif %>
   >
     <h3>
       <img
@@ -76,7 +77,7 @@
     <div class="mailpoet_actions">
       <a
         class="button-secondary"
-        href="#mta/mailpoet"><%= __('Configure') %></a>
+        href="#mta/MailPoet"><%= __('Configure') %></a>
     </div>
   </li>
   <li
@@ -125,7 +126,7 @@
   <!-- Sending Method: MailPoet -->
   <div
     class="mailpoet_sending_method"
-    data-method="mailpoet"
+    data-method="MailPoet"
     style="display:none;"
   >
     <h3><%= __('Open a free account with MailPoet, and get:') %></h3>
@@ -165,8 +166,8 @@
               type="text"
               id="mailpoet_api_key"
               size="40"
-              name="api_key"
-              value="<%= settings.api_key %>"
+              name="mta[api_key]"
+              value="<%= settings.mta.api_key %>"
             />
           </td>
         </tr>
@@ -666,7 +667,6 @@
         )
           ? $('.mailpoet_sending_method:visible').data('method')
           : $('#mta_method').val();
-
         alert(
           'Sending a test email to: '+recipient+
           ' using sending method: '+mta_method
diff --git a/webpack.config.js b/webpack.config.js
index 86be7a7b05..ade6c14f97 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -77,7 +77,7 @@ baseConfig = {
       {
         include: /html2canvas.js$/,
         loader: 'expose-loader?html2canvas',
-      },
+      }
     ]
   }
 };
@@ -92,7 +92,8 @@ config.push(_.extend({}, baseConfig, {
       'ajax',
       'modal',
       'notice',
-      'jquery.serialize_object'
+      'jquery.serialize_object',
+      'parsleyjs'
     ],
     admin: [
       'subscribers/subscribers.jsx',