diff --git a/src/imap_client.php b/src/imap_client.php
new file mode 100644
index 0000000..44a1fde
--- /dev/null
+++ b/src/imap_client.php
@@ -0,0 +1,27 @@
+<?php
+
+
+class ImapClient {
+
+    /*PhpImap\Mailbox */
+    private $mailbox;
+
+    public function __construct($imapPath, $login, $password) {
+        $this->mailbox = new PhpImap\Mailbox($imapPath, $login, $password);
+    }
+
+    /**
+     * print all mails for the given $user.
+     * @param $user User
+     * @return array
+     */
+    function get_emails(User $user): array {
+        // Search for mails with the recipient $address in TO or CC.
+        $mailsIdsTo = imap_sort($this->mailbox->getImapStream(), SORTARRIVAL, true, SE_UID, 'TO "' . $user->address . '"');
+        $mailsIdsCc = imap_sort($this->mailbox->getImapStream(), SORTARRIVAL, true, SE_UID, 'CC "' . $user->address . '"');
+        $mail_ids = array_merge($mailsIdsTo, $mailsIdsCc);
+
+        $emails = _load_emails($mail_ids, $user);
+        return $emails;
+    }
+}
\ No newline at end of file
diff --git a/src/index.php b/src/index.php
index 6373137..b3f3bab 100644
--- a/src/index.php
+++ b/src/index.php
@@ -5,18 +5,23 @@ require_once '../../config.php';
 # load php dependencies:
 require_once './backend-libs/autoload.php';
 
-$mailbox = new PhpImap\Mailbox($config['imap']['url'],
-    $config['imap']['username'],
-    $config['imap']['password']);
 
 require_once './user.php';
 require_once './autolink.php';
 require_once './pages.php';
 require_once './router.php';
+require_once './imap_client.php';
 
 $router = new Router($_SERVER['REQUEST_METHOD'], $_GET['action'] ?? NULL, $_GET, $_POST, $_SERVER['QUERY_STRING'], $config);
 $page = $router->route();
-$page->invoke();
+
+// TODO: remove $mailbox
+$mailbox = new PhpImap\Mailbox($config['imap']['url'],
+    $config['imap']['username'],
+    $config['imap']['password']);
+
+$imapClient = new ImapClient($config['imap']['url'], $config['imap']['username'], $config['imap']['password']);
+$page->invoke($imapClient);
 
 // delete after each request
 delete_old_messages();
@@ -32,22 +37,7 @@ function error($status, $text) {
     die();
 }
 
-/**
- * print all mails for the given $user.
- * @param $user User
- * @return array
- */
-function get_emails($user) {
-    global $mailbox;
 
-    // Search for mails with the recipient $address in TO or CC.
-    $mailsIdsTo = imap_sort($mailbox->getImapStream(), SORTARRIVAL, true, SE_UID, 'TO "' . $user->address . '"');
-    $mailsIdsCc = imap_sort($mailbox->getImapStream(), SORTARRIVAL, true, SE_UID, 'CC "' . $user->address . '"');
-    $mail_ids = array_merge($mailsIdsTo, $mailsIdsCc);
-
-    $emails = _load_emails($mail_ids, $user);
-    return $emails;
-}
 
 
 /**
diff --git a/src/pages.php b/src/pages.php
index aa5925b..8e09a5e 100644
--- a/src/pages.php
+++ b/src/pages.php
@@ -2,7 +2,7 @@
 
 abstract class Page {
 
-    function invoke() {
+    function invoke(ImapClient $imapClient) {
     }
 
     function if_invalid_redirect_to_random(User $user, array $config_domains) {
@@ -22,7 +22,7 @@ class RedirectToAddressPage extends Page {
         $this->domain = $domain;
     }
 
-    function invoke() {
+    function invoke(ImapClient $imapClient) {
         $user = User::parseUsernameAndDomain($this->username, $this->domain);
         header("location: ?" . $user->username . "@" . $user->domain);
     }
@@ -41,7 +41,7 @@ class DownloadEmailPage extends Page {
     }
 
 
-    function invoke() {
+    function invoke(ImapClient $imapClient) {
         $user = User::parseDomain($this->address);
         $this->if_invalid_redirect_to_random($user, $this->config_domains);
 
@@ -62,7 +62,7 @@ class DeleteEmailPage extends Page {
         $this->config_domains = $config_domains;
     }
 
-    function invoke() {
+    function invoke(ImapClient $imapClient) {
         $user = User::parseDomain($this->address);
         $this->if_invalid_redirect_to_random($user, $this->config_domains);
 
@@ -79,7 +79,7 @@ class RedirectToRandomAddressPage extends Page {
         $this->config_domains = $config_domains;
     }
 
-    function invoke() {
+    function invoke(ImapClient $imapClient) {
         redirect_to_random($this->config_domains);
     }
 
@@ -95,20 +95,20 @@ class DisplayEmailsPage extends Page {
     }
 
 
-    function invoke() {
+    function invoke(ImapClient $imapClient) {
         // print emails with html template
         $user = User::parseDomain($this->address);
         $this->if_invalid_redirect_to_random($user, $this->config['domains']);
 
         global $emails;
         global $config;
-        $emails = get_emails($user);
+        $emails = $imapClient->get_emails($user);
         require "frontend.template.php";
     }
 }
 
 class InvalidRequestPage extends Page {
-    function invoke() {
+    function invoke(ImapClient $imapClient) {
         error(400, "Bad Request");
     }
 }