Update sender_header_filter.pcre

Signed-off-by: Georg Lauterbach <44545919+georglauterbach@users.noreply.github.com>

CHANGELOG.md

@@ -6,6 +6,11 @@ All notable changes to this project will be documented in this file. The format
 
 > **Note**: Changes and additions listed here are contained in the `:edge` image tag. These changes may not be as stable as released changes.
 
+### Fixes
+
+- **Postfix**
+  - ensure message content is not modified by header filter ([#4427](https://github.com/docker-mailserver/docker-mailserver/pull/4427))
+
 ## [v15.0.1](https://github.com/docker-mailserver/docker-mailserver/releases/tag/v15.0.1)
 
 ### Added

target/postfix/sender_header_filter.pcre

@@ -1,11 +1,11 @@
-/^\s*Received:.*with ESMTPSA/       IGNORE
+/^\s*Received: from.*127.0.0.1/     IGNORE
 /^\s*Received:.*amavisd-new/        IGNORE
-/^\s*X-Originating-IP:/             IGNORE
+/^\s*Received:.*with ESMTPSA/       IGNORE
-/^\s*X-Mailer:/                     IGNORE
-/^\s*Mime-Version: 1.0.*/           REPLACE MIME-Version: 1.0
 /^\s*User-Agent/                    IGNORE
 /^\s*X-Enigmail/                    IGNORE
 /^\s*X-Mailer/                      IGNORE
+/^\s*X-MS-Reactions/                IGNORE
 /^\s*X-Originating-IP/              IGNORE
-/^\s*Received: from.*127.0.0.1/     IGNORE
+
-/^Content-Type:/i                   PREPEND X-MS-Reactions: disallow
+/^\s*Message-ID:/i                  PREPEND X-MS-Reactions: disallow
+/^\s*Mime-Version: 1.0.*/i          REPLACE MIME-Version: 1.0

test/tests/parallel/set3/container_configuration/hostname.bats

@@ -234,8 +234,9 @@ function _should_have_correct_mail_headers() {
   # but Amavis is changing that. It also changes protocol from SMTP to ESMTP.
   assert_line --index 7 --partial 'Received: from localhost (localhost [127.0.0.1])'
   assert_line --index 8 --partial "by ${EXPECTED_FQDN} (Postfix) with ESMTP id"
-  assert_line --index 14 --partial 'Message-Id:'
+  assert_line --index 14 'X-MS-Reactions: disallow'
-  assert_line --index 14 --partial "@${EXPECTED_FQDN}>"
+  assert_line --index 15 --partial 'Message-Id:'
+  assert_line --index 15 --partial "@${EXPECTED_FQDN}>"
 
   # Mail contents example:
   #