diff --git a/lib/models/MailQueueEntry.class.php.orig b/lib/models/MailQueueEntry.class.php.orig
deleted file mode 100644
index 7fe63f67ea8f828eeb5bbc79e5eeb52525b9e560..0000000000000000000000000000000000000000
--- a/lib/models/MailQueueEntry.class.php.orig
+++ /dev/null
@@ -1,137 +0,0 @@
-<?php
-
-/*
- *  Copyright (c) 2013  Rasmus Fuhse <fuhse@data-quest.de>
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License as
- *  published by the Free Software Foundation; either version 2 of
- *  the License, or (at your option) any later version.
- */
-
-/**
- * Class to handle entries in the mail-queue in Stud.IP.
- * Use MailQueueEntry::add($mail, $message_id, $user_id) to add a mail to the queue
- * and MailQueueEntry::sendAll() or MailQueueEntry::sendNew() to flush the queue
- * and send the mails.
- *
- * @property string $id alias column for mail_queue_id
- * @property string $mail_queue_id database column
- * @property JSONArrayObject $mail database column
- * @property string|null $message_id database column
- * @property string|null $user_id database column
- * @property int $tries database column
- * @property int $last_try database column
- * @property int $mkdate database column
- * @property int $chdate database column
- */
-class MailQueueEntry extends SimpleORMap
-{
-    protected static function configure($config = [])
-    {
-        $config['db_table'] = 'mail_queue_entries';
-
-        $config['serialized_fields']['mail'] = JSONArrayObject::class;
-
-        parent::configure($config);
-    }
-
-    /**
-     * Add an email to the queue.
-     * @param StudipMail $mail : the mailobject that should be added and sent later.
-     * @param string|null $message_id : the id of the Stud.IP internal message the
-     * mail is related to. Leave this null if it isn't related to any internal message.
-     * @param string|null $user_id : user_id of the receiver. Leave null if the
-     * receiver has no account in Stud.IP.
-     * @return MailQueueEntry : object in the mailqueue.
-     */
-    public static function add(StudipMail $mail, $message_id = null, $user_id = null)
-    {
-        $queue_entry = new self();
-        $queue_entry['mail'] = $mail->toArray();
-        $queue_entry['message_id'] = $message_id;
-        $queue_entry['user_id'] = $user_id;
-        $queue_entry['tries'] = 0;
-        $queue_entry->store();
-
-        return $queue_entry;
-    }
-
-    /**
-     * Sends all new mails in the mailqueue (which means they haven't been sent yet).
-     */
-    public static function sendNew()
-    {
-        self::findEachBySQL(function ($m) {
-            $m->send();
-        }, "tries = 0 ORDER BY mkdate");
-    }
-
-    /**
-     * Sends all mails in the mailqueue. Stud.IP will give each mail 24 tries to
-     * deliver it. If the mail could not be sent after 24 tries (which are 24
-     * hours) it will stay in the mailqueue table but won't be sent anymore.
-     * Each mail will only be tried to deliver once per hour. So if it fails
-     * Stud.IP will try again next hour.
-     *
-     * @param int $limit The maximum amount of messages to be sent.
-     * @return array An empty array if no status messages are output
-     *     or an array with status messages, one for each mail.
-     */
-    public static function sendAll($limit = null)
-    {
-        //The status messages will be returned
-        $status_messages = [];
-
-        self::findEachBySQL(function ($m) use (&$status_messages) {
-            // Reconstruct the StudipMail object
-            $mail = new StudipMail($m->mail);
-            $status_message = sprintf(
-                'sending message %1$s (sender: %2$s, %3$u recipient(s))...',
-                $m->message_id,
-                $mail->getSenderEmail(),
-                count($mail->getRecipients())
-            );
-
-            $was_sent = $m->send();
-            $status_message .= $was_sent ? 'DONE' : 'FAILURE';
-
-            if ($m->tries > 0) {
-                // If sending the message has failed at least once
-                // we add the amount of tries to the status message.
-                $status_message .= "(t={$m->tries})";
-            }
-
-            $status_messages[] = $status_message;
-        }, "tries = 0 " .
-           "OR (last_try > (UNIX_TIMESTAMP() - 60 * 60) AND tries < 25) ORDER BY mkdate".
-           ($limit > 0 ? " LIMIT ". (int) $limit : "")
-        );
-
-        return $status_messages;
-    }
-
-    /**
-     * Sends the object in the mailqueue. If this succeeds, the object will be
-     * deleted immediately. Otherwise the field "tries" in the mailqueue table
-     * will be incremented by one.
-     *
-     * @return bool True, if the mail in the mailqueue entry could be sent,
-     *     false otherwise.
-     */
-    public function send()
-    {
-        $mail = new StudipMail($this->mail);
-
-        $success = $mail->send();
-        if ($success) {
-            $this->delete();
-        } else {
-            $this['tries'] = $this['tries'] + 1;
-            $this['last_try'] = time();
-            $this->store();
-        }
-
-        return $success;
-    }
-}