diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/functions.customize.inc.php b/mailcow/src/mailcow-dockerized/data/web/inc/functions.customize.inc.php
new file mode 100644
index 0000000..f4c74d8
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/functions.customize.inc.php
@@ -0,0 +1,252 @@
+<?php
+function customize($_action, $_item, $_data = null) {
+	global $redis;
+	global $lang;
+  switch ($_action) {
+    case 'add':
+      if ($_SESSION['mailcow_cc_role'] != "admin") {
+        $_SESSION['return'][] = array(
+          'type' => 'danger',
+          'log' => array(__FUNCTION__, $_action, $_item, $_data),
+          'msg' => 'access_denied'
+        );
+        return false;
+      }
+      switch ($_item) {
+        case 'main_logo':
+          if (in_array($_data['main_logo']['type'], array('image/gif', 'image/jpeg', 'image/pjpeg', 'image/x-png', 'image/png', 'image/svg+xml'))) {
+            try {
+              if (file_exists($_data['main_logo']['tmp_name']) !== true) {
+                $_SESSION['return'][] = array(
+                  'type' => 'danger',
+                  'log' => array(__FUNCTION__, $_action, $_item, $_data),
+                  'msg' => 'img_tmp_missing'
+                );
+                return false;
+              }
+              $image = new Imagick($_data['main_logo']['tmp_name']);
+              if ($image->valid() !== true) {
+                $_SESSION['return'][] = array(
+                  'type' => 'danger',
+                  'log' => array(__FUNCTION__, $_action, $_item, $_data),
+                  'msg' => 'img_invalid'
+                );
+                return false;
+              }
+              $image->destroy();
+            }
+            catch (ImagickException $e) {
+              $_SESSION['return'][] = array(
+                'type' => 'danger',
+                'log' => array(__FUNCTION__, $_action, $_item, $_data),
+                'msg' => 'img_invalid'
+              );
+              return false;
+            }
+          }
+          else {
+            $_SESSION['return'][] = array(
+              'type' => 'danger',
+              'log' => array(__FUNCTION__, $_action, $_item, $_data),
+              'msg' => 'invalid_mime_type'
+            );
+            return false;
+          }
+          try {
+            $redis->Set('MAIN_LOGO', 'data:' . $_data['main_logo']['type'] . ';base64,' . base64_encode(file_get_contents($_data['main_logo']['tmp_name'])));
+          }
+          catch (RedisException $e) {
+            $_SESSION['return'][] = array(
+              'type' => 'danger',
+              'log' => array(__FUNCTION__, $_action, $_item, $_data),
+              'msg' => array('redis_error', $e)
+            );
+            return false;
+          }
+          $_SESSION['return'][] = array(
+            'type' => 'success',
+            'log' => array(__FUNCTION__, $_action, $_item, $_data),
+            'msg' => 'upload_success'
+          );
+        break;
+      }
+    break;
+    case 'edit':
+      if ($_SESSION['mailcow_cc_role'] != "admin") {
+        $_SESSION['return'][] = array(
+          'type' => 'danger',
+          'log' => array(__FUNCTION__, $_action, $_item, $_data),
+          'msg' => 'access_denied'
+        );
+        return false;
+      }
+      switch ($_item) {
+        case 'app_links':
+          $apps = (array)$_data['app'];
+          $links = (array)$_data['href'];
+          $out = array();
+          if (count($apps) == count($links)) {
+            for ($i = 0; $i < count($apps); $i++) {
+              $out[] = array($apps[$i] => $links[$i]);
+            }
+            try {
+              $redis->set('APP_LINKS', json_encode($out));
+            }
+            catch (RedisException $e) {
+              $_SESSION['return'][] = array(
+                'type' => 'danger',
+                'log' => array(__FUNCTION__, $_action, $_item, $_data),
+                'msg' => array('redis_error', $e)
+              );
+              return false;
+            }
+          }
+          $_SESSION['return'][] = array(
+            'type' => 'success',
+            'log' => array(__FUNCTION__, $_action, $_item, $_data),
+            'msg' => 'app_links'
+          );
+        break;
+        case 'ui_texts':
+          $title_name = $_data['title_name'];
+          $main_name = $_data['main_name'];
+          $apps_name = $_data['apps_name'];
+          $help_text = $_data['help_text'];
+          $ui_footer = $_data['ui_footer'];
+          $ui_announcement_text = $_data['ui_announcement_text'];
+          $ui_announcement_type = (in_array($_data['ui_announcement_type'], array('info', 'warning', 'danger'))) ? $_data['ui_announcement_type'] : false;
+          $ui_announcement_active = (!empty($_data['ui_announcement_active']) ? 1 : 0);
+          try {
+            $redis->set('TITLE_NAME', htmlspecialchars($title_name));
+            $redis->set('MAIN_NAME', htmlspecialchars($main_name));
+            $redis->set('APPS_NAME', htmlspecialchars($apps_name));
+            $redis->set('HELP_TEXT', $help_text);
+            $redis->set('UI_FOOTER', $ui_footer);
+            $redis->set('UI_ANNOUNCEMENT_TEXT', $ui_announcement_text);
+            $redis->set('UI_ANNOUNCEMENT_TYPE', $ui_announcement_type);
+            $redis->set('UI_ANNOUNCEMENT_ACTIVE', $ui_announcement_active);
+          }
+          catch (RedisException $e) {
+            $_SESSION['return'][] = array(
+              'type' => 'danger',
+              'log' => array(__FUNCTION__, $_action, $_item, $_data),
+              'msg' => array('redis_error', $e)
+            );
+            return false;
+          }
+          $_SESSION['return'][] = array(
+            'type' => 'success',
+            'log' => array(__FUNCTION__, $_action, $_item, $_data),
+            'msg' => 'ui_texts'
+          );
+        break;
+      }
+    break;
+    case 'delete':
+      if ($_SESSION['mailcow_cc_role'] != "admin") {
+        $_SESSION['return'][] = array(
+          'type' => 'danger',
+          'log' => array(__FUNCTION__, $_action, $_item, $_data),
+          'msg' => 'access_denied'
+        );
+        return false;
+      }
+      switch ($_item) {
+        case 'main_logo':
+          try {
+            if ($redis->del('MAIN_LOGO')) {
+              $_SESSION['return'][] = array(
+                'type' => 'success',
+                'log' => array(__FUNCTION__, $_action, $_item, $_data),
+                'msg' => 'reset_main_logo'
+              );
+              return true;
+            }
+          }
+          catch (RedisException $e) {
+            $_SESSION['return'][] = array(
+              'type' => 'danger',
+              'log' => array(__FUNCTION__, $_action, $_item, $_data),
+              'msg' => array('redis_error', $e)
+            );
+            return false;
+          }
+        break;
+      }
+    break;
+    case 'get':
+      switch ($_item) {
+        case 'app_links':
+          try {
+            $app_links = json_decode($redis->get('APP_LINKS'), true);
+          }
+          catch (RedisException $e) {
+            $_SESSION['return'][] = array(
+              'type' => 'danger',
+              'log' => array(__FUNCTION__, $_action, $_item, $_data),
+              'msg' => array('redis_error', $e)
+            );
+            return false;
+          }
+          return ($app_links) ? $app_links : false;
+        break;
+        case 'main_logo':
+          try {
+            return $redis->get('MAIN_LOGO');
+          }
+          catch (RedisException $e) {
+            $_SESSION['return'][] = array(
+              'type' => 'danger',
+              'log' => array(__FUNCTION__, $_action, $_item, $_data),
+              'msg' => array('redis_error', $e)
+            );
+            return false;
+          }
+        break;
+        case 'ui_texts':
+          try {
+            $data['title_name'] = ($title_name = $redis->get('TITLE_NAME')) ? $title_name : 'mailcow UI';
+            $data['main_name'] = ($main_name = $redis->get('MAIN_NAME')) ? $main_name : 'mailcow UI';
+            $data['apps_name'] = ($apps_name = $redis->get('APPS_NAME')) ? $apps_name : 'mailcow Apps';
+            $data['help_text'] = ($help_text = $redis->get('HELP_TEXT')) ? $help_text : false;
+            if (!empty($redis->get('UI_IMPRESS'))) {
+              $redis->set('UI_FOOTER', $redis->get('UI_IMPRESS'));
+              $redis->del('UI_IMPRESS');
+            }
+            $data['ui_footer'] = ($ui_footer = $redis->get('UI_FOOTER')) ? $ui_footer : false;
+            $data['ui_announcement_text'] = ($ui_announcement_text = $redis->get('UI_ANNOUNCEMENT_TEXT')) ? $ui_announcement_text : false;
+            $data['ui_announcement_type'] = ($ui_announcement_type = $redis->get('UI_ANNOUNCEMENT_TYPE')) ? $ui_announcement_type : false;
+            $data['ui_announcement_active'] = ($redis->get('UI_ANNOUNCEMENT_ACTIVE') == 1) ? 1 : 0;
+            return $data;
+          }
+          catch (RedisException $e) {
+            $_SESSION['return'][] = array(
+              'type' => 'danger',
+              'log' => array(__FUNCTION__, $_action, $_item, $_data),
+              'msg' => array('redis_error', $e)
+            );
+            return false;
+          }
+        break;
+        case 'main_logo_specs':
+          try {
+            $image = new Imagick();
+            $img_data = explode('base64,', customize('get', 'main_logo'));
+            if ($img_data[1]) {
+              $image->readImageBlob(base64_decode($img_data[1]));
+            }
+            return $image->identifyImage();
+          }
+          catch (ImagickException $e) {
+            $_SESSION['return'][] = array(
+              'type' => 'danger',
+              'log' => array(__FUNCTION__, $_action, $_item, $_data),
+              'msg' => 'imagick_exception'
+            );
+            return false;
+          }
+        break;
+      }
+    break;
+  }
+}
\ No newline at end of file