[Minor] Fix R_MISSING_CHARSET rule

Do not trigger on messages with empty payload body as Content-Type header is not mandatory (RFC7231).

diff --git a/rules/regexp/headers.lua b/rules/regexp/headers.lua
index 593052a3833939f440c52845c544338fcb93e24f..a2e7f3829c9bdfcf4e878aa1ae991b9af9e21628 100644 (file)
--- a/rules/regexp/headers.lua
+++ b/rules/regexp/headers.lua
@@ -93,7 +93,7 @@ reconf['R_RCVD_SPAMBOTS'] = {
 
 -- Charset is missing in message
 reconf['R_MISSING_CHARSET'] = {
-  re = string.format('content_type_is_type(text) & !content_type_has_param(charset) & !%s',
+  re = string.format('!is_empty_body() & content_type_is_type(text) & !content_type_has_param(charset) & !%s',
     'compare_transfer_encoding(7bit)'),
   score = 2.5,
   description = 'Charset is missing in a message',