diff --git a/api/cora/setting.example.php b/api/cora/setting.example.php
index cd89d72..b898295 100644
--- a/api/cora/setting.example.php
+++ b/api/cora/setting.example.php
@@ -111,19 +111,26 @@ final class setting {
     'beestat_root_uri' => '',
 
     /**
-     * Your Mailchimp API Key; provided to you when you create a Mailchimp
-     * developer account.
+     * Your Mailgun API Key.
      *
-     * Example: hcU74TJgGS5k7vuw3NSzkRMSWNPkv8Af-us18
+     * Example: 4b34e48e768fa45c4a6ac65dd4cf1da9-7e28d3c3-61713777
      */
-    'mailchimp_api_key' => '',
+    'mailgun_api_key' => '',
 
     /**
-     * ID of the mailing list to send emails to.
+     * API base URL including the sending domain. Make sure to include the
+     * trailing slash.
      *
-     * Example: uw3NSzkRMS
+     * Example: https://api.mailgun.net/v3/
      */
-    'mailchimp_list_id' => '',
+    'mailgun_base_url' => '',
+
+    /**
+     * The specific newsletter to subscribe users to.
+     *
+     * Example: newsletter@app.beestat.io
+     */
+    'mailgun_newsletter' => '',
 
     /**
      * Auth ID for Smarty Streets address verification.
diff --git a/api/ecobee.php b/api/ecobee.php
index 53fcb87..c757838 100644
--- a/api/ecobee.php
+++ b/api/ecobee.php
@@ -60,13 +60,9 @@ class ecobee extends external_api {
       );
 
       $identifiers = [];
-      $email_addresses = [];
       foreach($response['thermostatList'] as $thermostat) {
         $runtime = $thermostat['runtime'];
         $identifiers[] = $thermostat['identifier'];
-
-        $notification_settings = $thermostat['notificationSettings'];
-        $email_addresses = array_merge($email_addresses, $notification_settings['emailAddresses']);
       }
 
       // Look to see if any of the returned thermostats exist. This does not use
@@ -119,22 +115,6 @@ class ecobee extends external_api {
       else {
         $this->api('user', 'create_anonymous_user');
         $this->api('ecobee_token', 'create', ['attributes' => $ecobee_token]);
-
-        if(count($email_addresses) > 0) {
-          try {
-            $this->api(
-              'mailchimp',
-              'subscribe',
-              [
-                'email_address' => $email_addresses[0]
-              ]
-            );
-          } catch(Exception $e) {
-            // Ignore failed subscribe exceptions since it's not critical to the
-            // success of this. Everything is logged regardless.
-          }
-        }
-
       }
 
       // Redirect to the proper location.
diff --git a/api/ecobee_thermostat.php b/api/ecobee_thermostat.php
index 38e5bae..5c8ebe6 100644
--- a/api/ecobee_thermostat.php
+++ b/api/ecobee_thermostat.php
@@ -99,6 +99,7 @@ class ecobee_thermostat extends cora\crud {
 
     // Loop over the returned thermostats and create/update them as necessary.
     $thermostat_ids_to_keep = [];
+    $email_addresses = [];
     foreach($response['thermostatList'] as $api_thermostat) {
       $ecobee_thermostat = $this->get(
         [
@@ -169,6 +170,12 @@ class ecobee_thermostat extends cora\crud {
         ]
       );
 
+      foreach($api_thermostat['notificationSettings']['emailAddresses'] as $email_address) {
+        if(preg_match('/.+@.+\..+/', $email_address) === 1) {
+          $email_addresses[] = trim(strtolower($email_address));
+        }
+      }
+
       // Grab a bunch of attributes from the ecobee_thermostat and attach them
       // to the thermostat.
       $attributes = [];
@@ -260,6 +267,19 @@ class ecobee_thermostat extends cora\crud {
       );
     }
 
+    // Update the email_address on the user.
+    if(count($email_addresses) > 0) {
+      $email_address_counts = array_count_values($email_addresses);
+      arsort($email_address_counts);
+      $email_address = array_keys(array_slice($email_address_counts, 0, 1, true))[0];
+      $this->api('user', 'update', [
+        'attributes' => [
+          'user_id' => $this->session->get_user_id(),
+          'email_address' => $email_address
+        ]
+      ]);
+    }
+
     // Inactivate any ecobee_thermostats that were no longer returned.
     $thermostats = $this->api('thermostat', 'read');
     $ecobee_thermostat_ids_to_return = [];
diff --git a/api/external_api.php b/api/external_api.php
index 748d0c3..6b1a2c9 100644
--- a/api/external_api.php
+++ b/api/external_api.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * All external APIs (ecobee, SmartyStreets, Patreon, MailChimp) extend this
+ * All external APIs (ecobee, SmartyStreets, Patreon, Mailgun) extend this
  * class. This provides a generic cURL function with a couple basic arguments,
  * and also logging.
  *
@@ -88,7 +88,10 @@ class external_api extends cora\api {
 
       $this->curl_info = curl_getinfo($curl_handle);
 
-      if($curl_response === false || curl_errno($curl_handle) !== 0) {
+      if(
+        $curl_response === false ||
+        curl_errno($curl_handle) !== 0
+      ) {
         // Error logging
         if($this::$log_mysql === 'all' || $this::$log_mysql === 'error') {
           $this->log_mysql($curl_response, true);
@@ -103,7 +106,6 @@ class external_api extends cora\api {
             'curl_error' => curl_error($curl_handle)
           ]
         );
-
       }
 
       // General (success) logging
diff --git a/api/mailchimp.php b/api/mailchimp.php
deleted file mode 100644
index dd44dfa..0000000
--- a/api/mailchimp.php
+++ /dev/null
@@ -1,80 +0,0 @@
-<?php
-
-/**
- * High level functionality for interacting with the Mailchimp API.
- *
- * @author Jon Ziebell
- */
-class mailchimp extends external_api {
-
-  protected static $log_mysql = 'all';
-
-  protected static $cache = false;
-  protected static $cache_for = null;
-
-  /**
-   * Send an API call off to MailChimp
-   *
-   * @param string $method HTTP Method.
-   * @param string $endpoint API Endpoint.
-   * @param array $data API request data.
-   *
-   * @throws Exception If MailChimp did not return valid JSON.
-   *
-   * @return array The MailChimp response.
-   */
-  private function mailchimp_api($method, $endpoint, $data) {
-    $curl_response = $this->curl([
-      'url' => 'https://us18.api.mailchimp.com/3.0/' . $endpoint,
-      'post_fields' => json_encode($data, JSON_FORCE_OBJECT),
-      'method' => $method,
-      'header' => [
-        'Authorization: Basic ' . base64_encode(':' . $this->setting->get('mailchimp_api_key')),
-        'Content-Type: application/x-www-form-urlencoded'
-      ]
-    ]);
-
-    $response = json_decode($curl_response, true);
-
-    if ($response === null) {
-      throw new Exception('Invalid JSON');
-    }
-
-    return $response;
-  }
-
-  /**
-   * Subscribe an email address to the mailing list. This will only mark you
-   * as "pending" so you have to click a link in the email to actually
-   * subscribe.
-   *
-   * @param string $email_address The email address to subscribe.
-   *
-   * @throws Exception If subscribing to the mailing list fails for some
-   * reason. For example, if already subscribed.
-   *
-   * @return array The MailChimp response.
-   */
-  public function subscribe($email_address) {
-    $method = 'POST';
-
-    $endpoint =
-      'lists/' .
-      $this->setting->get('mailchimp_list_id') .
-      '/members/'
-    ;
-
-    $data = [
-      'email_address' => $email_address,
-      'status' => 'pending'
-    ];
-
-    $response = $this->mailchimp_api($method, $endpoint, $data);
-
-    if(isset($response['id']) === false) {
-      throw new Exception('Could not subscribe to mailing list.');
-    }
-
-    return $response;
-  }
-}
diff --git a/api/mailgun.php b/api/mailgun.php
new file mode 100644
index 0000000..768a4ce
--- /dev/null
+++ b/api/mailgun.php
@@ -0,0 +1,123 @@
+<?php
+
+/**
+ * High level functionality for interacting with the Mailgun API.
+ *
+ * @author Jon Ziebell
+ */
+class mailgun extends external_api {
+
+  protected static $log_mysql = 'all';
+
+  protected static $cache = false;
+  protected static $cache_for = null;
+
+  public static $exposed = [
+    'private' => [],
+    'public' => [
+      'subscribe',
+      'unsubscribe'
+    ]
+  ];
+
+  /**
+   * Send an API call off to mailgun
+   *
+   * @param string $method HTTP Method.
+   * @param string $endpoint API Endpoint.
+   * @param array $data API request data.
+   *
+   * @throws Exception If mailgun did not return valid JSON.
+   *
+   * @return array The mailgun response.
+   */
+  private function mailgun_api($method, $endpoint, $data) {
+    $curl_response = $this->curl([
+      'url' => $this->setting->get('mailgun_base_url') . $endpoint,
+      'post_fields' => $data,
+      'method' => $method,
+      'header' => [
+        'Authorization: Basic ' . base64_encode('api:' . $this->setting->get('mailgun_api_key')),
+        'Content-Type: multipart/form-data'
+      ]
+    ]);
+
+    $response = json_decode($curl_response, true);
+
+    if ($response === null) {
+      throw new cora\exception('Invalid JSON', 10600);
+    }
+
+    return $response;
+  }
+
+  /**
+   * Subscribe to the mailing list.
+   *
+   * @param string $email_address The email address to subscribe.
+   *
+   * @throws exception If the subscribe failed.
+   *
+   * @return array Subscriber info.
+   */
+  public function subscribe($email_address) {
+    $method = 'POST';
+
+    $endpoint = 'lists/' . $this->setting->get('mailgun_newsletter') . '/members';
+
+    $data = [
+      'address' => $email_address,
+      'subscribed' => 'yes',
+      'upsert' => 'yes'
+    ];
+
+    $response = $this->mailgun_api($method, $endpoint, $data);
+
+    if (
+      isset($response['member']) &&
+      isset($response['member']['address']) &&
+      isset($response['member']['subscribed']) &&
+      $response['member']['address'] === $email_address &&
+      $response['member']['subscribed'] === true
+    ) {
+      return $response['member'];
+    } else {
+      throw new cora\exception('Failed to subscribe.', 10601);
+    }
+  }
+
+  /**
+   * Unsubscribe from the mailing list.
+   *
+   * @param string $email_address The email address to unsubscribe.
+   *
+   * @throws exception If the unsubscribe failed.
+   *
+   * @return array Subscriber info.
+   */
+  public function unsubscribe($email_address) {
+    $method = 'POST';
+
+    $endpoint = 'lists/' . $this->setting->get('mailgun_newsletter') . '/members';
+
+    $data = [
+      'address' => $email_address,
+      'subscribed' => 'no',
+      'upsert' => 'yes'
+    ];
+
+    $response = $this->mailgun_api($method, $endpoint, $data);
+
+    if (
+      isset($response['member']) &&
+      isset($response['member']['address']) &&
+      isset($response['member']['subscribed']) &&
+      $response['member']['address'] === $email_address &&
+      $response['member']['subscribed'] === false
+    ) {
+      return $response['member'];
+    } else {
+      throw new cora\exception('Failed to unsubscribe.', 10602);
+    }
+  }
+}
diff --git a/api/mailchimp_api_cache.php b/api/mailgun_api_cache.php
similarity index 55%
rename from api/mailchimp_api_cache.php
rename to api/mailgun_api_cache.php
index 35f5d28..7d7ac7f 100644
--- a/api/mailchimp_api_cache.php
+++ b/api/mailgun_api_cache.php
@@ -1,8 +1,8 @@
-<?php
-
-/**
- * Cache for these external API calls.
- *
- * @author Jon Ziebell
- */
-class mailchimp_api_cache extends external_api_cache {}
+<?php
+
+/**
+ * Cache for these external API calls.
+ *
+ * @author Jon Ziebell
+ */
+class mailgun_api_cache extends external_api_cache {}
diff --git a/api/mailchimp_api_log.php b/api/mailgun_api_log.php
similarity index 56%
rename from api/mailchimp_api_log.php
rename to api/mailgun_api_log.php
index c294e67..1c04605 100644
--- a/api/mailchimp_api_log.php
+++ b/api/mailgun_api_log.php
@@ -1,8 +1,8 @@
-<?php
-
-/**
- * Log for these external API calls.
- *
- * @author Jon Ziebell
- */
-class mailchimp_api_log extends external_api_log {}
+<?php
+
+/**
+ * Log for these external API calls.
+ *
+ * @author Jon Ziebell
+ */
+class mailgun_api_log extends external_api_log {}
diff --git a/css/dashboard.css b/css/dashboard.css
index a66e19a..e130fb1 100644
--- a/css/dashboard.css
+++ b/css/dashboard.css
@@ -345,6 +345,7 @@ a.inverted:active {
 .icon.code_tags:before { content: "\F174"; }
 .icon.dots_vertical:before { content: "\F1D9"; }
 .icon.download:before { content: "\F1DA"; }
+.icon.email:before { content: "\F1EE"; }
 .icon.exit_to_app:before { content: "\F206"; }
 .icon.eye:before { content: "\F208"; }
 .icon.eye_off:before { content: "\F209"; }
diff --git a/js/beestat/api.js b/js/beestat/api.js
index 1dbb432..a2fb98d 100644
--- a/js/beestat/api.js
+++ b/js/beestat/api.js
@@ -164,21 +164,32 @@ beestat.api.prototype.load_ = function(response_text) {
     return;
   }
 
+  // Special handling for these error codes.
+  const error_codes = {
+    'log_out': [
+      1505,  // Session is expired.
+      10000, // Could not get first token.
+      10001, // Could not refresh ecobee token; no token found.
+      10002, // Could not refresh ecobee token; ecobee returned no token.
+      10500, // Ecobee access was revoked by user.
+      10501  // No ecobee access for this user.
+    ],
+    'ignore': [
+      10601  // Failed to subscribe.
+    ]
+  };
+
   // Error handling
   if (
     response.data &&
-    (
-      response.data.error_code === 1505  || // Session is expired.
-      response.data.error_code === 10000 || // Could not get first token.
-      response.data.error_code === 10001 || // Could not refresh ecobee token; no token found.
-      response.data.error_code === 10002 || // Could not refresh ecobee token; ecobee returned no token.
-      response.data.error_code === 10500 || // Ecobee access was revoked by user.
-      response.data.error_code === 10501    // No ecobee access for this user.
-    )
+    error_codes.log_out.includes(response.data.error_code) === true
   ) {
     window.location.href = '/';
     return;
-  } else if (response.success !== true) {
+  } else if (
+    response.success !== true &&
+    error_codes.ignore.includes(response.data.error_code) === false
+  ) {
     beestat.error(
       'API call failed: ' + response.data.error_message,
       JSON.stringify(response, null, 2)
diff --git a/js/beestat/setting.js b/js/beestat/setting.js
index 59e481a..8c5854f 100644
--- a/js/beestat/setting.js
+++ b/js/beestat/setting.js
@@ -34,7 +34,9 @@ beestat.setting = function(key, opt_value, opt_callback) {
     'comparison_region': 'global',
     'comparison_property_type': 'similar',
 
-    'temperature_unit': '°F'
+    'temperature_unit': '°F',
+
+    'first_run': true
   };
 
   if (user.settings === null) {
diff --git a/js/component/card/footer.js b/js/component/card/footer.js
index 8993282..39b4815 100644
--- a/js/component/card/footer.js
+++ b/js/component/card/footer.js
@@ -21,38 +21,39 @@ beestat.component.card.footer.prototype.decorate_contents_ = function(parent) {
   footer_links.appendChild(
     $.createElement('a')
       .setAttribute('href', 'https://doc.beestat.io/')
-      .innerHTML('Help')
+      .innerText('Help')
   );
-  footer_links.appendChild($.createElement('span').innerHTML(' • '));
+  footer_links.appendChild($.createElement('span').innerText(' • '));
 
   footer_links.appendChild(
     $.createElement('a')
       .setAttribute('href', 'https://community.beestat.io/')
       .setAttribute('target', '_blank')
-      .innerHTML('Feedback')
+      .innerText('Feedback')
   );
-  footer_links.appendChild($.createElement('span').innerHTML(' • '));
+  footer_links.appendChild($.createElement('span').innerText(' • '));
 
   footer_links.appendChild(
     $.createElement('a')
       .setAttribute('href', 'https://beestat.io/privacy/')
       .setAttribute('target', '_blank')
-      .innerHTML('Privacy')
+      .innerText('Privacy')
   );
-  footer_links.appendChild($.createElement('span').innerHTML(' • '));
+  footer_links.appendChild($.createElement('span').innerText(' • '));
 
   footer_links.appendChild(
     $.createElement('a')
-      .setAttribute('href', 'http://eepurl.com/dum59r')
-      .setAttribute('target', '_blank')
-      .innerHTML('Mailing List')
+      .innerText('Newsletter')
+      .addEventListener('click', function() {
+        (new beestat.component.modal.newsletter()).render();
+      })
   );
-  footer_links.appendChild($.createElement('span').innerHTML(' • '));
+  footer_links.appendChild($.createElement('span').innerText(' • '));
 
   footer_links.appendChild(
     $.createElement('a')
       .setAttribute('href', 'mailto:contact@beestat.io')
-      .innerHTML('Contact')
+      .innerText('Contact')
   );
 
 };
diff --git a/js/component/card/runtime_thermostat_detail.js b/js/component/card/runtime_thermostat_detail.js
index 2ea5399..f3151f0 100644
--- a/js/component/card/runtime_thermostat_detail.js
+++ b/js/component/card/runtime_thermostat_detail.js
@@ -27,8 +27,7 @@ beestat.component.card.runtime_thermostat_detail = function(thermostat_id) {
     [
       'setting.runtime_thermostat_detail_range_type',
       'setting.runtime_thermostat_detail_range_dynamic',
-      'cache.runtime_thermostat',
-      'cache.thermostat'
+      'cache.runtime_thermostat'
     ],
     change_function
   );
diff --git a/js/component/input/text.js b/js/component/input/text.js
index 0cae499..88f0e32 100644
--- a/js/component/input/text.js
+++ b/js/component/input/text.js
@@ -63,7 +63,7 @@ beestat.component.input.text.prototype.decorate_ = function(parent) {
     parent.appendChild(icon_container);
 
     this.input_.style({
-      'padding-left': '24px'
+      'padding-left': '28px'
     });
 
     (new beestat.component.icon(this.icon_).set_size(16)
diff --git a/js/component/modal/newsletter.js b/js/component/modal/newsletter.js
new file mode 100644
index 0000000..62f7d91
--- /dev/null
+++ b/js/component/modal/newsletter.js
@@ -0,0 +1,131 @@
+/**
+ * Newsletter
+ */
+beestat.component.modal.newsletter = function() {
+  beestat.component.modal.apply(this, arguments);
+};
+beestat.extend(beestat.component.modal.newsletter, beestat.component.modal);
+
+/**
+ * Decorate
+ *
+ * @param {rocket.Elements} parent
+ */
+beestat.component.modal.newsletter.prototype.decorate_contents_ = function(parent) {
+  parent.appendChild($.createElement('p').innerHTML('Interested in following beestat development? Subscribe to the newsletter for an updates. Emails are sparse; only a few every year.'));
+
+  this.email_address_ = new beestat.component.input.text()
+    .set_style({
+      'width': '100%',
+      'max-width': '300px',
+      'border-bottom': '2px solid ' + beestat.style.color.lightblue.base
+    });
+
+  if (this.subscribed_ === true) {
+    this.email_address_.set_icon('check');
+    this.email_address_.disable();
+    this.email_address_.set_value(this.state_.email_address_);
+  } else if (this.subscribed_ === false) {
+    this.email_address_.set_icon('email');
+    this.email_address_.set_value(this.state_.email_address_);
+  } else {
+    this.email_address_.set_icon('email');
+    this.email_address_.set_value(beestat.user.get().email_address);
+  }
+
+  this.email_address_.render(parent);
+
+  if (this.subscribed_ === true) {
+    parent.appendChild($.createElement('p').innerHTML('You are now subscribed to the beestat newsletter!'));
+  } else if (this.subscribed_ === false) {
+    parent.appendChild(
+      $.createElement('p')
+        .innerHTML(this.error_)
+        .style('color', beestat.style.color.red.base)
+    );
+  }
+};
+
+/**
+ * Get title.
+ *
+ * @return {string} Tht title.
+ */
+beestat.component.modal.newsletter.prototype.get_title_ = function() {
+  return 'Newsletter';
+};
+
+/**
+ * Get the buttons that go on the bottom of this modal.
+ *
+ * @return {[beestat.component.button]} The buttons.
+ */
+beestat.component.modal.newsletter.prototype.get_buttons_ = function() {
+  var self = this;
+
+  let buttons = [];
+  if (this.subscribed_ === true) {
+    const ok = new beestat.component.button()
+      .set_background_color(beestat.style.color.green.base)
+      .set_background_hover_color(beestat.style.color.green.light)
+      .set_text_color('#fff')
+      .set_text('Close')
+      .addEventListener('click', function() {
+        self.dispose();
+      });
+    buttons.push(ok);
+  } else {
+    const no_thanks = new beestat.component.button()
+      .set_background_color('#fff')
+      .set_text_color(beestat.style.color.gray.base)
+      .set_text_hover_color(beestat.style.color.red.base)
+      .set_text('No Thanks')
+      .addEventListener('click', function() {
+        self.dispose();
+      });
+    buttons.push(no_thanks);
+
+    const subscribe = new beestat.component.button()
+      .set_background_color(beestat.style.color.green.base)
+      .set_background_hover_color(beestat.style.color.green.light)
+      .set_text_color('#fff')
+      .set_text('Subscribe')
+      .addEventListener('click', function() {
+        self.state_.email_address_ = self.email_address_.get_value();
+
+        if (self.state_.email_address_.match(/.+@.+\..+/) === null) {
+          self.subscribed_ = false;
+          self.error_ = 'Invalid email address.';
+          self.rerender();
+          return;
+        }
+
+        this
+          .set_background_color(beestat.style.color.gray.base)
+          .set_background_hover_color()
+          .removeEventListener('click');
+
+        no_thanks.removeEventListener('click');
+
+        new beestat.api()
+          .add_call(
+            'mailgun',
+            'subscribe',
+            {'email_address': self.state_.email_address_}
+          )
+          .set_callback(function(response) {
+            if (response.subscribed === true) {
+              self.subscribed_ = true;
+            } else {
+              self.subscribed_ = false;
+              self.error_ = 'Subscribe failed; please try again later.';
+            }
+            self.rerender();
+          })
+          .send();
+      });
+    buttons.push(subscribe);
+  }
+
+  return buttons;
+};
diff --git a/js/js.php b/js/js.php
index 98bd230..4827853 100755
--- a/js/js.php
+++ b/js/js.php
@@ -97,6 +97,7 @@ if($setting->get('environment') === 'dev' || $setting->get('environment') === 'd
   echo '<script src="/js/component/modal/thermostat_info.js"></script>' . PHP_EOL;
   echo '<script src="/js/component/modal/weather.js"></script>' . PHP_EOL;
   echo '<script src="/js/component/modal/patreon_status.js"></script>' . PHP_EOL;
+  echo '<script src="/js/component/modal/newsletter.js"></script>' . PHP_EOL;
   echo '<script src="/js/component/input.js"></script>' . PHP_EOL;
   echo '<script src="/js/component/input/text.js"></script>' . PHP_EOL;
   echo '<script src="/js/component/button.js"></script>' . PHP_EOL;
diff --git a/js/layer/load.js b/js/layer/load.js
index 5f695f0..2986ba5 100644
--- a/js/layer/load.js
+++ b/js/layer/load.js
@@ -225,7 +225,14 @@ beestat.layer.load.prototype.decorate_ = function(parent) {
       }
     }
 
-    if (
+    /*
+     * Show the first run modal or the announcements modal if there are unread
+     * important announcements.
+     */
+    if (beestat.setting('first_run') === true) {
+      beestat.setting('first_run', false);
+      (new beestat.component.modal.newsletter()).render();
+    } else if (
       last_read_announcement_id === undefined ||
       (
         most_recent_important_announcement_id !== undefined &&
@@ -234,7 +241,6 @@ beestat.layer.load.prototype.decorate_ = function(parent) {
     ) {
       (new beestat.component.modal.announcements()).render();
     }
-
   });
 
   api.send();