From 6def189d16143978b004c18e38d7ae4b3aa474ac Mon Sep 17 00:00:00 2001
From: feld <40271278+feld@users.noreply.github.com>
Date: Fri, 5 Jun 2026 12:16:41 -0700
Subject: [PATCH] Revert "Aggressive LMTP header cleanup (#816)"

This reverts commit 921080125fb1c9075dff0428075389ff23d2270e.
---
 .../src/cmdeploy/postfix/lmtp_header_cleanup  | 26 +++----------------
 1 file changed, 3 insertions(+), 23 deletions(-)

diff --git a/cmdeploy/src/cmdeploy/postfix/lmtp_header_cleanup b/cmdeploy/src/cmdeploy/postfix/lmtp_header_cleanup
index 8b3cf2e7..3c45f8d8 100644
--- a/cmdeploy/src/cmdeploy/postfix/lmtp_header_cleanup
+++ b/cmdeploy/src/cmdeploy/postfix/lmtp_header_cleanup
@@ -1,23 +1,3 @@
-# List of headers for incoming messages 
-# that must be retained for functionality and compatibility reasons 
-/^From:/            DUNNO
-/^Message-Id:/      DUNNO
-/^Chat-/            DUNNO
-/^Content-Type:/    DUNNO
-
-# For receiving clear-text messages (still supported in May 2026)
-/^Subject:/         DUNNO
-/^Date:/            DUNNO
-/^To:/              DUNNO
-/^CC:/              DUNNO
-/^References:/      DUNNO
-/^In-Reply-To:/     DUNNO
-
-# Senders might support Autocrypt 1 but not RFC9788 (Header Protection) 
-/^Autocrypt:/       DUNNO
-
-# SecureJoin V2 protocol headers (for backward compatibility) 
-/^Secure-Join/      DUNNO
-
-# Ignore all other headers
-/.*/                IGNORE
+/^DKIM-Signature:/            IGNORE
+/^Authentication-Results:/            IGNORE
+/^Received:/            IGNORE