[Mime] allow non-ASCII characters in local part of email

dmaicher · dmaicher · commit 961bc6a928ed · 2020-03-23T13:15:15.000+01:00
diff --git a/src/Symfony/Component/Mime/Encoder/IdnAddressEncoder.php b/src/Symfony/Component/Mime/Encoder/IdnAddressEncoder.php
@@ -11,25 +11,21 @@
 
 namespace Symfony\Component\Mime\Encoder;
 
-use Symfony\Component\Mime\Exception\AddressEncoderException;
-
 /**
  * An IDN email address encoder.
  *
  * Encodes the domain part of an address using IDN. This is compatible will all
  * SMTP servers.
  *
- * This encoder does not support email addresses with non-ASCII characters in
- * local-part (the substring before @).
+ * Note: It leaves the local part as is. In case there are non-ASCII characters
+ * in the local part then it depends on the SMTP Server if this is supported.
  *
  * @author Christian Schmidt
  */
 final class IdnAddressEncoder implements AddressEncoderInterface
 {
     /**
      * Encodes the domain part of an address using IDN.
-     *
-     * @throws AddressEncoderException If local-part contains non-ASCII characters
      */
     public function encodeString(string $address): string
     {
@@ -38,10 +34,6 @@ public function encodeString(string $address): string
             $local = substr($address, 0, $i);
             $domain = substr($address, $i + 1);
 
-            if (preg_match('/[^\x00-\x7F]/', $local)) {
-                throw new AddressEncoderException(sprintf('Non-ASCII characters not supported in local-part os "%s".', $address));
-            }
-
             if (preg_match('/[^\x00-\x7F]/', $domain)) {
                 $address = sprintf('%s@%s', $local, idn_to_ascii($domain, 0, INTL_IDNA_VARIANT_UTS46));
             }
