From 657bf296185ac1dbabf5aa39110a3e351510ff51 Mon Sep 17 00:00:00 2001
From: Mark Felder <feld@feld.me>
Date: Tue, 20 Jan 2026 15:21:47 -0800
Subject: [PATCH] Aggressive LMTP header cleanup

This will remove all headers possible during LMTP delivery.

From header: required or clients do not process the message correctly

Message-Id header: required for clients to know which messages have been
downloaded
---
 cmdeploy/src/cmdeploy/postfix/lmtp_header_cleanup | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/cmdeploy/src/cmdeploy/postfix/lmtp_header_cleanup b/cmdeploy/src/cmdeploy/postfix/lmtp_header_cleanup
index 85f4b7a2..69a537db 100644
--- a/cmdeploy/src/cmdeploy/postfix/lmtp_header_cleanup
+++ b/cmdeploy/src/cmdeploy/postfix/lmtp_header_cleanup
@@ -1,2 +1,3 @@
-/^DKIM-Signature:/            IGNORE
-/^Authentication-Results:/            IGNORE
+/^From:/            DUNNO
+/^Message-Id:/      DUNNO
+/.*/                IGNORE