From ded2e51e60325a0e817362c6df0c341bb00d4b0e Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@rspamd.com>
Date: Sat, 22 Oct 2022 13:00:21 +0100
Subject: [CritFix] Restore compatibility with the integrations and headers
 alterations

---
 src/plugins/lua/milter_headers.lua | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/plugins/lua/milter_headers.lua b/src/plugins/lua/milter_headers.lua
index 913b71f54..a8be5ef37 100644
--- a/src/plugins/lua/milter_headers.lua
+++ b/src/plugins/lua/milter_headers.lua
@@ -39,6 +39,7 @@ local settings = {
   skip_all = false,
   local_headers = {},
   authenticated_headers = {},
+  headers_modify_mode = 'compat', -- To avoid compatibility issues on upgrade
   default_headers_order = nil, -- Insert at the end (set 1 to insert just after the first received)
   routines = {
     ['remove-headers'] = {
@@ -572,7 +573,7 @@ local function milter_headers(task)
     lua_mime.modify_headers(task, {
       add = add,
       remove = remove
-    })
+    }, settings.headers_modify_mode)
   end
 end
 
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