First comit

override/controllers/front/ContactController.php

@@ -0,0 +1,55 @@
+<?php
+class ContactController extends ContactControllerCore
+{
+    public function postProcess()
+    {
+        session_start();
+        $filename = _PS_ROOT_DIR_ . 'banned.txt';
+
+        if (Tools::isSubmit('submitMessage')) {
+
+            $message = Tools::getValue('message');
+            $from = Tools::getValue('from');
+
+            if (file_exists($filename)) {
+
+                $banned_in_email = array();
+                $banned_content = ['email marketing'];
+                $target = Context::getContext()->link->getPageLink('contact');
+
+                try {
+                    $file = preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $filename);
+                    $file = new SplFileObject($file);
+                } catch (LogicException $exception) {
+                    die('SplFileObject : ' . $exception->getMessage());
+                }
+                while ($file->valid()) {
+                    $line = $file->fgets();
+                    array_push($banned_in_email, trim($line));
+                }
+                $file = null;
+
+                $_SESSION["bannedctc"] = "notbanned";
+
+                foreach ($banned_in_email as $string) {
+
+                    if (strstr($from, $string)) {
+                        //$this->errors[] = Tools::displayError('This email address is not allowed');
+                        $_SESSION["bannedctc"] = "banned";
+                        Tools::redirectAdmin($target);
+                    }
+                }
+
+                foreach ($banned_content as $string) {
+                    if (strstr($message, $string)) {
+                        //$this->errors[] = Tools::displayError('Invalid Content');
+                        $_SESSION["bannedctc"] = "banned";
+                        Tools::redirectAdmin($target);
+                    }
+                }
+            }
+        }
+        echo $_SESSION["bannedctc"];
+        parent::postProcess();
+    }
+}