diff --git a/src/pages.php b/src/pages.php
index 5da1ddf..edeaa4a 100644
--- a/src/pages.php
+++ b/src/pages.php
@@ -6,7 +6,7 @@ abstract class Page {
     }
 
     function if_invalid_redirect_to_random(User $user, array $config_domains) {
-        if ($user->isInvalid()) {
+        if ($user->isInvalid($config_domains)) {
             $this->redirect_to_random($config_domains);
             exit();
         }
@@ -40,14 +40,16 @@ abstract class Page {
 class RedirectToAddressPage extends Page {
     private $username;
     private $domain;
+    private $config_blocked_usernames;
 
-    public function __construct(string $username, string $domain) {
+    public function __construct(string $username, string $domain, array $config_blocked_usernames) {
         $this->username = $username;
         $this->domain = $domain;
+        $this->config_blocked_usernames = $config_blocked_usernames;
     }
 
     function invoke(ImapClient $imapClient) {
-        $user = User::parseUsernameAndDomain($this->username, $this->domain);
+        $user = User::parseUsernameAndDomain($this->username, $this->domain, $this->config_blocked_usernames);
         header("location: ?" . $user->username . "@" . $user->domain);
     }
 }
@@ -57,16 +59,18 @@ class DownloadEmailPage extends Page {
     private $email_id;
     private $address;
     private $config_domains;
+    private $config_blocked_usernames;
 
-    public function __construct(string $email_id, string $address, array $config_domains) {
+    public function __construct(string $email_id, string $address, array $config_domains, array $config_blocked_usernames) {
         $this->email_id = $email_id;
         $this->address = $address;
         $this->config_domains = $config_domains;
+        $this->config_blocked_usernames = $config_blocked_usernames;
     }
 
 
     function invoke(ImapClient $imapClient) {
-        $user = User::parseDomain($this->address);
+        $user = User::parseDomain($this->address, $this->config_blocked_usernames);
         $this->if_invalid_redirect_to_random($user, $this->config_domains);
 
         $download_email_id = filter_var($this->email_id, FILTER_SANITIZE_NUMBER_INT);
@@ -79,15 +83,17 @@ class DeleteEmailPage extends Page {
     private $email_id;
     private $address;
     private $config_domains;
+    private $config_blocked_usernames;
 
-    public function __construct($email_id, $address, $config_domains) {
+    public function __construct($email_id, $address, $config_domains, array $config_blocked_usernames) {
         $this->email_id = $email_id;
         $this->address = $address;
         $this->config_domains = $config_domains;
+        $this->config_blocked_usernames = $config_blocked_usernames;
     }
 
     function invoke(ImapClient $imapClient) {
-        $user = User::parseDomain($this->address);
+        $user = User::parseDomain($this->address, $this->config_blocked_usernames);
         $this->if_invalid_redirect_to_random($user, $this->config_domains);
 
         $delete_email_id = filter_var($this->email_id, FILTER_SANITIZE_NUMBER_INT);
@@ -121,7 +127,7 @@ class DisplayEmailsPage extends Page {
 
     function invoke(ImapClient $imapClient) {
         // print emails with html template
-        $user = User::parseDomain($this->address);
+        $user = User::parseDomain($this->address, $this->config['blocked_usernames']);
         $this->if_invalid_redirect_to_random($user, $this->config['domains']);
 
         global $emails;
diff --git a/src/router.php b/src/router.php
index 39db024..ef97b66 100644
--- a/src/router.php
+++ b/src/router.php
@@ -25,17 +25,17 @@ class Router {
         if ($this->action === "redirect"
             && isset($this->post_vars['username'])
             && isset($this->post_vars['domain'])) {
-            return new RedirectToAddressPage($this->post_vars['username'], $this->post_vars['domain']);
+            return new RedirectToAddressPage($this->post_vars['username'], $this->post_vars['domain'], $this->config['blocked_usernames']);
 
         } elseif ($this->action === "download_email"
             && isset($this->get_vars['download_email_id'])
             && isset($this->get_vars['address'])) {
-            return new DownloadEmailPage($this->get_vars['download_email_id'], $this->get_vars['address'], $this->config['domains']);
+            return new DownloadEmailPage($this->get_vars['download_email_id'], $this->get_vars['address'], $this->config['domains'], $this->config['blocked_usernames']);
 
         } elseif ($this->action === "delete_email"
             && isset($this->get_vars['delete_email_id'])
             && isset($this->get_vars['address'])) {
-            return new DeleteEmailPage($this->get_vars['delete_email_id'], $this->get_vars['address'], $this->config['domains']);
+            return new DeleteEmailPage($this->get_vars['delete_email_id'], $this->get_vars['address'], $this->config['domains'], $this->config['blocked_usernames']);
 
         } elseif ($this->action === 'random') {
             return new RedirectToRandomAddressPage($this->config['domains']);
diff --git a/src/user.php b/src/user.php
index 6e02745..2f3305a 100644
--- a/src/user.php
+++ b/src/user.php
@@ -5,29 +5,28 @@ class User {
     public $username;
     public $domain;
 
-    public function isInvalid(): bool {
-        global $config;
+    public function isInvalid(array $config_domains): bool {
         if (empty($this->username) || empty($this->domain)) {
             return true;
-        } else if (!in_array($this->domain, $config['domains'])) {
+        } else if (!in_array($this->domain, $config_domains)) {
             return true;
         } else {
             return false;
         }
     }
 
-    public static function parseDomain(string $address): User {
+    public static function parseDomain(string $address, array $config_blocked_usernames): User {
         $clean_address = User::_clean_address($address);
         $user = new User();
-        $user->username = User::_clean_username($clean_address);
+        $user->username = User::_clean_username($clean_address, $config_blocked_usernames);
         $user->domain = User::_clean_domain($clean_address);
         $user->address = $user->username . '@' . $user->domain;
         return $user;
     }
 
-    public static function parseUsernameAndDomain(string $username, string $domain): User {
+    public static function parseUsernameAndDomain(string $username, string $domain, $config_blocked_usernames): User {
         $user = new User();
-        $user->username = User::_clean_username($username);
+        $user->username = User::_clean_username($username, $config_blocked_usernames);
         $user->domain = User::_clean_domain($domain);
         $user->address = $user->username . '@' . $user->domain;
         return $user;
@@ -35,26 +34,24 @@ class User {
 
     /**
      * Remove illegal characters from address.
-     * @param $address
      * @return string clean address
      */
-    private static function _clean_address($address) {
+    private static function _clean_address(string $address) {
         return strtolower(filter_var($address, FILTER_SANITIZE_EMAIL));
     }
 
 
     /**
      * Remove illegal characters from username and remove everything after the @-sign. You may extend it if your server supports them.
-     * @param $address
+     *
      * @return string clean username
      */
-    private static function _clean_username($address) {
-        global $config;
+    private static function _clean_username(string $address, array $config_blocked_usernames) {
         $username = strtolower($address);
         $username = preg_replace('/@.*$/', "", $username);   // remove part after @
         $username = preg_replace('/[^A-Za-z0-9_.+-]/', "", $username);   // remove special characters
 
-        if (in_array($username, $config['blocked_usernames'])) {
+        if (in_array($username, $config_blocked_usernames)) {
             // Forbidden name!
             return '';
         }
@@ -63,7 +60,7 @@ class User {
     }
 
 
-    private static function _clean_domain($address) {
+    private static function _clean_domain(string $address) {
         $username = strtolower($address);
         $username = preg_replace('/^.*@/', "", $username);   // remove part before @
         return preg_replace('/[^A-Za-z0-9_.+-]/', "", $username);   // remove special characters