fix for email validation

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v1.7.39
+## 01/02/2023
+
+1. [](#bugfix)
+   * Fixed an issue with `email` validation that was failing on UTF-8 characters. Following best practices and now only check for `@` and length.
+
 # v1.7.38
 ## 01/02/2023
 
@@ -7,7 +13,6 @@
    * Vendor library updates to latest versions
    * Updated `bin/composer.phar` to latest `2.4.4` version [#3627](https://github.com/getgrav/grav/issues/3627)
 1. [](#bugfix)
-
    * Don't fail hard if pages recurse with same path
    * Github workflows security hardening [#3624](https://github.com/getgrav/grav/pull/3624)
 

system/src/Grav/Common/Data/Validation.php

@@ -638,7 +638,7 @@ class Validation
         $values = !is_array($value) ? explode(',', preg_replace('/\s+/', '', $value)) : $value;
 
         foreach ($values as $val) {
-            if (!(self::typeText($val, $params, $field) && filter_var($val, FILTER_VALIDATE_EMAIL))) {
+            if (!(self::typeText($val, $params, $field) && strpos($val, '@', 1))) {
                 return false;
             }
         }