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-rw-r--r--rules/misc.lua12
1 files changed, 11 insertions, 1 deletions
diff --git a/rules/misc.lua b/rules/misc.lua
index 728b694cd..a9b5fd94d 100644
--- a/rules/misc.lua
+++ b/rules/misc.lua
@@ -209,8 +209,18 @@ rspamd_config.HEADER_FORGED_MDN = {
local headers_unique = {
'Content-Type',
'Content-Transfer-Encoding',
+ -- https://tools.ietf.org/html/rfc5322#section-3.6
'Date',
- 'Message-ID'
+ 'From',
+ 'Sender',
+ 'Reply-To',
+ 'To',
+ 'Cc',
+ 'Bcc',
+ 'Message-ID',
+ 'In-Reply-To',
+ 'References',
+ 'Subject'
}
rspamd_config.MULTIPLE_UNIQUE_HEADERS = {