From 91f0f1135604c077a6aceae7c6b1196b99c215ae Mon Sep 17 00:00:00 2001
From: Valentin Salmeron <valentin.salmeron.pro@gmail.com>
Date: Wed, 25 Jan 2023 14:48:11 +0100
Subject: [PATCH 1/2] Update ParserTest.php

---
 tests/ParserTest.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/ParserTest.php b/tests/ParserTest.php
index 9b663adb4..a670315c6 100644
--- a/tests/ParserTest.php
+++ b/tests/ParserTest.php
@@ -1900,7 +1900,7 @@ public function testCharsetSupportedAsAnAlias()
         $Parser = new Parser();
         $Parser->setPath($file);
         $this->assertEquals('<foo@bar.de>', $Parser->getHeader('from'));
-        $this->assertStringContainsString('次の受信者またはグル?プへの配信に失?', $Parser->getMessageBody('text'));
+        $this->assertStringContainsString('次の受信者またはグループへの配信に失敗しました:', $Parser->getMessageBody('text'));
     }
 
     public function testCharsetNotSupportedByMBString()

From 4796abd288d1d62ddae01a57c946761b1717021b Mon Sep 17 00:00:00 2001
From: Valentin Salmeron <valentin.salmeron.pro@gmail.com>
Date: Wed, 25 Jan 2023 14:49:38 +0100
Subject: [PATCH 2/2] Update Charset.php

---
 src/Charset.php | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/Charset.php b/src/Charset.php
index cd219f226..6063bc5f6 100644
--- a/src/Charset.php
+++ b/src/Charset.php
@@ -320,6 +320,23 @@ public function decodeCharset($encodedString, $charset)
         if ($charset == 'utf-8' || $charset == 'us-ascii') {
             return $encodedString;
         }
+        
+        // Handle gb2312 from Windows-based software products
+        if ($charset === 'gb2312') {
+            // Disable E_NOTICE errors to ignore E_NOTICE possibly triggered by iconv()
+            $currentErrorReporting = error_reporting();
+            error_reporting($currentErrorReporting & ~E_NOTICE);
+            
+            $result = iconv($charset, 'utf-8', $encodedString);
+            
+            error_reporting($currentErrorReporting);
+            
+            if ($result) {
+                return $result;
+            }
+            
+            $charset = 'gbk'; // If decoding from gb2312 failed, use gbk instead
+        }
 
         if (function_exists('mb_convert_encoding')) {
             if ($charset == 'iso-2022-jp') {