diff --git a/user_register_notify.module b/user_register_notify.module
index 4bbb9de..bf09382 100644
--- a/user_register_notify.module
+++ b/user_register_notify.module
@@ -73,12 +73,12 @@ function user_register_notify_setup_email(&$edit, &$account, $action = 'insert')
     switch ($notify_type) {
       case 'Custom':
         if(!empty($from)) {
-            $emails = preg_split('/,[\w]+/', variable_get('user_register_notify_mailto', $from));
+            $emails = preg_split('/,[\s]*/', variable_get('user_register_notify_mailto', $from));
         }
         break;
       case 'Both':
         if(!empty($from)) {
-            $emails = preg_split('/,[\w]+/', variable_get('user_register_notify_mailto', $from));
+            $emails = preg_split('/,[\s]*/', variable_get('user_register_notify_mailto', $from));
         }
         // There is no break here for a reason.
       case 'Role':