[Minor] Be more strict about bad mime structure

rules/misc.lua

@@ -174,13 +174,9 @@ rspamd_config.R_SUSPICIOUS_URL = {
 
 rspamd_config.BROKEN_HEADERS = {
   callback = function(task)
-    if task:has_flag('broken_headers') then
-      return true
-    end
-
-    return false
+    return task:has_flag('broken_headers')
   end,
-  score = 1.0,
+  score = 10.0,
   group = 'header',
   description = 'Headers structure is likely broken'
 }
@@ -760,5 +756,4 @@ local freemail_reply_neq_from_id = rspamd_config:register_symbol({
   score = 3.0
 })
 rspamd_config:register_dependency(freemail_reply_neq_from_id, 'FREEMAIL_REPLYTO')
-rspamd_config:register_dependency(freemail_reply_neq_from_id, 'FREEMAIL_FROM')
-
+rspamd_config:register_dependency(freemail_reply_neq_from_id, 'FREEMAIL_FROM')

src/libmime/mime_parser.c

@@ -945,7 +945,7 @@ rspamd_mime_parse_message (struct rspamd_task *task,
 				hdrs = rspamd_message_get_header_from_hash (task->raw_headers,
 						task->task_pool,
 						"Content-Type", FALSE);
-				task->flags |= RSPAMD_TASK_FLAG_BROKEN_HEADERS|RSPAMD_TASK_FLAG_EMPTY;
+				task->flags |= RSPAMD_TASK_FLAG_BROKEN_HEADERS;
 			}
 			else {
 				body_pos = 0;