From 64e533b717c1a426c69a20f2a938271013e5a39e Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Mon, 7 Dec 2015 11:31:28 +0000
Subject: [PATCH] Add support of 'special' SA headers to 'exists' function

---
 src/plugins/lua/spamassassin.lua | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/plugins/lua/spamassassin.lua b/src/plugins/lua/spamassassin.lua
index ea2f954771..39dd5cd8c3 100644
--- a/src/plugins/lua/spamassassin.lua
+++ b/src/plugins/lua/spamassassin.lua
@@ -376,8 +376,23 @@ local function maybe_parse_sa_function(line)
   local substitutions = {
     {'^exists:',
       function(task) -- filter
-        if task:get_header(arg) then
-          return 1
+        local hdrs_check = {}
+        if arg == 'MESSAGEID' then
+          hdrs_check = {
+            'Message-ID',
+            'X-Message-ID',
+            'Resent-Message-ID'
+          }
+        elseif arg == 'ToCc' then
+          hdrs_check = { 'To', 'Cc', 'Bcc' }
+        else
+          hdrs_check = {arg}
+        end
+
+        for i,h in ipairs(hdrs_check) do
+          if task:get_header(h) then
+            return 1
+          end
         end
         return 0
       end,
-- 
2.47.3