diff --git a/api/lang/locale/de_DE.utf-8/LC_MESSAGES/Horde_Mime.mo b/api/lang/locale/de_DE.utf-8/LC_MESSAGES/Horde_Mime.mo
new file mode 100644
index 0000000000..da5c0a2a6c
Binary files /dev/null and b/api/lang/locale/de_DE.utf-8/LC_MESSAGES/Horde_Mime.mo differ
diff --git a/api/lang/locale/de_DE.utf-8/LC_MESSAGES/Horde_Mime.po b/api/lang/locale/de_DE.utf-8/LC_MESSAGES/Horde_Mime.po
new file mode 100644
index 0000000000..4dc0ef387f
--- /dev/null
+++ b/api/lang/locale/de_DE.utf-8/LC_MESSAGES/Horde_Mime.po
@@ -0,0 +1,40 @@
+# German translations for Horde_Mime module.
+# Copyright 2010-2017 Horde LLC (http://www.horde.org/)
+# This file is distributed under the same license as the Horde_Mime module.
+# Automatically generated, 2010.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Horde_Mime\n"
+"Report-Msgid-Bugs-To: dev@lists.horde.org\n"
+"POT-Creation-Date: 2015-01-08 11:22+0100\n"
+"PO-Revision-Date: 2010-10-13 01:27+0200\n"
+"Last-Translator: Automatically generated\n"
+"Language-Team: i18n@lists.horde.org\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: lib/Horde/Mime/Mdn.php:188
+msgid "Disposition Notification"
+msgstr "Empfangsbestätigung"
+
+#: lib/Horde/Mime/Mail.php:439
+msgid "HTML Version of Message"
+msgstr "HTML-Version der Nachricht"
+
+#: lib/Horde/Mime/Mail.php:437
+msgid "Plaintext Version of Message"
+msgstr "Textversion der Nachricht"
+
+#: lib/Horde/Mime/Mdn.php:201
+#, php-format
+msgid ""
+"The message sent on %s to %s with subject \"%s\" has been displayed.\n"
+"\n"
+"This is no guarantee that the message has been read or understood."
+msgstr ""
+"Die Nachricht mit dem Betreff \"%3$s\", die am %1$s an %2$s geschickt wurde, "
+"ist angezeigt worden."
\ No newline at end of file
diff --git a/api/src/Mail.php b/api/src/Mail.php
index 071e35340e..040d1682b5 100644
--- a/api/src/Mail.php
+++ b/api/src/Mail.php
@@ -27,6 +27,8 @@ use Horde_Mime_Magic;
 use Horde_Mail_Rfc822;
 use Horde_Mail_Rfc822_List;
 use Horde_Mime_Mdn;
+use Horde_Translation;
+use Horde_Translation_Handler_Gettext;
 use EGroupware\Api;
 
 use tidy;
@@ -7248,6 +7250,10 @@ class Mail
 		if (self::$debug) error_log(__METHOD__.__LINE__.array2string($identity));
 		$headers = $this->getMessageHeader($uid, '', 'object', true, $_folder);
 
+		// Override Horde's translation with our own
+		Horde_Translation::setHandler('Horde_Mime', new Horde_Translation_Handler_Gettext('Horde_Mime', EGW_SERVER_ROOT.'/api/lang/locale'));
+		Preferences::setlocale();
+
 		$mdn = new Horde_Mime_Mdn($headers);
 		$mdn->generate(true, true, 'displayed', php_uname('n'), $acc->smtpTransport(), array(
 			'charset' => 'utf-8',