diff --git a/data/conf/rspamd/custom/bulk_header.map b/data/conf/rspamd/custom/bulk_header.map
index e9dc206f..fbe582ca 100644
--- a/data/conf/rspamd/custom/bulk_header.map
+++ b/data/conf/rspamd/custom/bulk_header.map
@@ -17,3 +17,4 @@
 /.*light-house-traffic.*/i
 /.*newsletterplus.*/i
 /.*X-Chpo.*/i
+/Thread-Topic:\s[a-zA-Z]{3}\s[a-zA-Z]{2}\s*$/i
diff --git a/data/conf/rspamd/local.d/groups.conf b/data/conf/rspamd/local.d/groups.conf
index ef599ef3..b5be5166 100644
--- a/data/conf/rspamd/local.d/groups.conf
+++ b/data/conf/rspamd/local.d/groups.conf
@@ -9,6 +9,9 @@ symbols {
   "BAD_REP_POLICIES" {
     score = 2.0;
   }
+  "BAD_HEADER" {
+    score = 10.0;
+  }
   "BULK_HEADER" {
     score = 4.0;
   }
diff --git a/data/conf/rspamd/local.d/multimap.conf b/data/conf/rspamd/local.d/multimap.conf
index c3a59d85..26496131 100644
--- a/data/conf/rspamd/local.d/multimap.conf
+++ b/data/conf/rspamd/local.d/multimap.conf
@@ -19,6 +19,14 @@ BULK_HEADER {
   symbols_set = ["BULK_HEADER"];
 }
 
+BAD_HEADER {
+  type = "content";
+  map = "${LOCAL_CONFDIR}/custom/bad_header.map";
+  filter = "headers"
+  regexp = true;
+  symbols_set = ["BAD_HEADER"];
+}
+
 LOCAL_BL_ASN {
   require_symbols = "!MAILCOW_WHITE";
   type = "asn";