diff --git a/.gitignore b/.gitignore
index 115bbf0..a982c3a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
-/csv
 /cache
 /composer.lock
+/csv
+/conf/MD_CONF_EMAIL.php
 /translation-importer
 /values/langfiles
 *.swp
diff --git a/.gitmodules b/.gitmodules
index 279f876..b4f8b3f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "classes/MDTlLoader"]
 	path = classes/MDTlLoader
 	url = /var/www/vhosts/museum-digital.de/git-base/MDTlLoader/
+[submodule "classes/MDMailer"]
+	path = classes/MDMailer
+	url = /var/www/vhosts/museum-digital.de/git-base/MDMailer
diff --git a/classes/MDErrorReporter b/classes/MDErrorReporter
index ef00d81..c13d06e 160000
--- a/classes/MDErrorReporter
+++ b/classes/MDErrorReporter
@@ -1 +1 @@
-Subproject commit ef00d81c1d70b9402f22ba00c52bc2fca7a2e8e5
+Subproject commit c13d06eccb5127c932e53bc0bbda33810c871d0c
diff --git a/classes/MDMailer b/classes/MDMailer
new file mode 160000
index 0000000..ae2d831
--- /dev/null
+++ b/classes/MDMailer
@@ -0,0 +1 @@
+Subproject commit ae2d83172d8b144e6ec7b031853da7a2ef80a613
diff --git a/composer.json b/composer.json
index cbadbc6..b25b9a0 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,8 @@
 {
     "require-dev": {
         "phpunit/phpunit": "^8.4"
+    },
+    "require": {
+        "phpmailer/phpmailer": "^6.1"
     }
 }
diff --git a/functions/functions.php b/functions/functions.php
index de0e9f7..6cfe4ba 100644
--- a/functions/functions.php
+++ b/functions/functions.php
@@ -9,10 +9,14 @@
 declare(strict_types = 1);
 
 // Set autoloader
+error_reporting(E_ALL);
+ini_set('display_errors', "1");
 spl_autoload_register("mdCsvxmlAutoloader");
 set_exception_handler("mdExceptionHandler");
 set_error_handler("mdErrorHandler", E_ALL);
 
+require_once __DIR__ . '/../vendor/autoload.php';
+
 /**
  * Autoloader for museum-digital.org.
  *
@@ -28,6 +32,8 @@ function mdCsvxmlAutoloader(string $className):void {
         __DIR__ . "/../classes/MDAllowedValueSets/src",
         __DIR__ . "/../classes/MDExportFormats/src",
         __DIR__ . "/../classes/MDErrorReporter",
+        __DIR__ . "/../classes/MDMailer/src",
+        __DIR__ . "/../conf",
         __DIR__ . "/../classes/MDErrorReporter/exceptions/generic",
         __DIR__ . "/../classes/MDErrorReporter/exceptions/page",
         __DIR__ . "/../classes/MDErrorReporter/exceptions/updates",
diff --git a/index.php b/index.php
index f1ce677..febb0e2 100644
--- a/index.php
+++ b/index.php
@@ -34,7 +34,6 @@ $toInject = '
 ';
 echo printHTMLHead($toInject);
 
-
 echo '
 
 <div class="uploader">