Index: /lib/functions.inc.php
===================================================================
--- /lib/functions.inc.php	(revision 7422)
+++ /lib/functions.inc.php	(revision 7423)
@@ -522,7 +522,13 @@
 				break;
 			
+			case WSPG_SANITIZE_EMAIL:
+				
+				if (sanitize_email($val) == $val) $bReturn = true;
+				
+				break;
+				
 			case WPSG_SANITIZE_PATH:
 			case WPSG_SANITIZE_APIKEY:
-			case WPSG_SANITIZE_URL:
+			case WPSG_SANITIZE_URL:			
 			case WPSG_SANITIZE_TEXTFIELD:
 				
Index: /mods/wpsg_mod_paypal.class.php
===================================================================
--- /mods/wpsg_mod_paypal.class.php	(revision 7422)
+++ /mods/wpsg_mod_paypal.class.php	(revision 7423)
@@ -94,11 +94,11 @@
 			$this->shop->update_option('wpsg_mod_paypal_hint', $_REQUEST['wpsg_mod_paypal_hint'], false, false, WPSG_SANITIZE_TEXTAREA);
 			$this->shop->update_option('wpsg_mod_paypal_gebuehr', $_REQUEST['wpsg_mod_paypal_gebuehr'], false, false, WPSG_SANITIZE_FLOAT);
-			$this->shop->update_option('wpsg_mod_paypal_mwst', $_REQUEST['wpsg_mod_paypal_mwst'], false, false, "wpsg_taxkey");
+			$this->shop->update_option('wpsg_mod_paypal_mwst', $_REQUEST['wpsg_mod_paypal_mwst'], false, false, WPSG_SANITIZE_TAXKEY);
 			
 			// Vor dem CreateWebHook
-			$this->shop->update_option('wpsg_mod_paypal_sandbox', $_REQUEST['wpsg_mod_paypal_sandbox'], false, false, "key");
+			$this->shop->update_option('wpsg_mod_paypal_sandbox', $_REQUEST['wpsg_mod_paypal_sandbox'], false, false, WPSG_SANITIZE_CHECKBOX);
 						
 			// Classic API
-			$this->shop->update_option('wpsg_mod_paypal_email', $_REQUEST['wpsg_mod_paypal_email'], false, false, "email");
+			$this->shop->update_option('wpsg_mod_paypal_email', $_REQUEST['wpsg_mod_paypal_email'], false, false, WSPG_SANITIZE_EMAIL);
 			
 			// Rest API
Index: /wpshopgermany.php
===================================================================
--- /wpshopgermany.php	(revision 7422)
+++ /wpshopgermany.php	(revision 7423)
@@ -91,4 +91,5 @@
 	define('WPSG_SANITIZE_URL', 8);
 	define('WPSG_SANITIZE_TEXTAREA', 9);
+	define('WSPG_SANITIZE_EMAIL', 10);
  	
 	// Ist in Multiblog manchma nicht definiert :? Sonst ist hier das Verzeichnis drin