Index: src/admin/includes/functions/general.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/admin/includes/functions/general.php	(revision be5231e4c5ceb8d95f3ac32413c7d4c8a19bdc42)
+++ src/admin/includes/functions/general.php	(revision )
@@ -1,9 +1,9 @@
 <?php
 /* --------------------------------------------------------------
-  general.php 2016-12-16
+  general.php 2017-06-03
   Gambio GmbH
   http://www.gambio.de
-  Copyright (c) 2016 Gambio GmbH
+  Copyright (c) 2017 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
 
@@ -33,7 +33,7 @@
   Copyright (c) Strider | Strider@oscworks.com
   Copyright (c  Nick Stanko of UkiDev.com, nick@ukidev.com
   Copyright (c) Andre ambidex@gmx.net
-  Copyright (c) 2001,2002 Ian C Wilson http://www.phesis.org
+  Copyright (c) 2017,2002 Ian C Wilson http://www.phesis.org
 
   Released under the GNU General Public License
   -------------------------------------------------------------- */
@@ -2584,6 +2584,19 @@
 	return '<input type="number" name="configuration_value" value="' . $name . '" />';
 }
 
+/**
+ * Creates an input field of type email for configuration values.
+ * IMPORTANT NOTE: name attribute gets replaced on admin/configuration.php:839
+ *
+ * @param string $name Value of name attribute.
+ *
+ * @return string Input element of type number.
+ */
+function cfg_email_required_input($name)
+{
+	return '<input type="email" name="configuration_value" value="' . $name . '" required />';
+}
+
 // function for configuration values
 function gm_cfg_get_orders_status($orders_id)
 {
@@ -2807,4 +2820,4 @@
 	$t_pull_down_html .= '</select>';
 
 	return $t_pull_down_html;
-}
\ No newline at end of file
+}
Index: src/admin/styles/compatibility/imports/_configuration.scss
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/admin/styles/compatibility/imports/_configuration.scss	(revision be5231e4c5ceb8d95f3ac32413c7d4c8a19bdc42)
+++ src/admin/styles/compatibility/imports/_configuration.scss	(revision )
@@ -43,6 +43,7 @@
   // Task #21 fix configuration input widths
   input[type="text"],
   input[type="number"],
+  input[type="email"],
   input[type="password"],
   select,
   textarea {
@@ -54,6 +55,7 @@
 
   input[type="text"],
   input[type="number"],
+  input[type="email"],
   input[type="password"],
   select {
     height:       30px;
Index: src/admin/styles/compatibility/_compatibility.scss
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/admin/styles/compatibility/_compatibility.scss	(revision be5231e4c5ceb8d95f3ac32413c7d4c8a19bdc42)
+++ src/admin/styles/compatibility/_compatibility.scss	(revision )
@@ -608,6 +608,7 @@
 		// Compatibility style for input fields.
 		input[type="text"],
 		input[type="number"],
+		input[type="email"],
 		select,
 		textarea {
 			//min-width: 170px;