From d1b0df1b41dbbd7c4b9e4c03967317e49739a6b7 Mon Sep 17 00:00:00 2001
From: Janos SUTO <sj@acts.hu>
Date: Wed, 11 May 2022 11:20:26 +0200
Subject: [PATCH] removeJournal should restore LF characters

Signed-off-by: Janos SUTO <sj@acts.hu>
---
 webui/system/helper/mime.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/webui/system/helper/mime.php b/webui/system/helper/mime.php
index d50727de..9e5d5857 100644
--- a/webui/system/helper/mime.php
+++ b/webui/system/helper/mime.php
@@ -144,12 +144,22 @@ class Piler_Mime_Decode {
    public static function removeJournal(&$message, $EOL = "\n") {
       $has_journal = 0;
 
+      $crlfs = substr_count($message, "\r\n");
+
       self::splitMessageRaw($message, $headers, $journal, $body);
 
       if($journal) {
          $has_journal = 1;
       }
 
+      // If the message has >10 CRLF sequences, then we assume
+      // that we need to restore the removed LF characters
+      if($crlfs > 10) {
+         $headers = str_replace("\n", "\r\n", $headers);
+         $body = str_replace("\n", "\r\n", $body);
+         $EOL = "\r\n";
+      }
+
       $message = $headers . $EOL . $EOL . $body;
 
       return $has_journal;