Merge pull request #4950 from twesterhever/temp-cd-message-body

Add Content-Description header rules

rules/regexp/headers.lua

@@ -903,6 +903,20 @@ reconf['HAS_ORG_HEADER'] = {
   group = 'headers'
 }
 
+reconf['HAS_CD_HEADER'] = {
+  re = 'header_exists(Content-Description)',
+  description = 'Has Content-Description header',
+  score = 0.0,
+  group = 'headers'
+}
+
+reconf['CD_MM_BODY'] = {
+  re = 'Content-Description=/^Mail message body$/Hi',
+  description = 'Content-Description header reads "Mail message body", commonly seen in spam',
+  score = 2.0,
+  group = 'headers'
+}
+
 reconf['X_PHPOS_FAKE'] = {
   re = 'X-PHP-Originating-Script=/^\\d{7}:/Hi',
   description = 'Fake X-PHP-Originating-Script header',