[Rspamd] Fix cases of forwarding via freemail

Excluding FREEMAIL_ENVFROM from the FREEMAIL_POLICY_FAILURE expression will allow forwarding mail via freemail services when the initial sender did not have a DKIM signature.

data/conf/rspamd/local.d/composites.conf

@@ -8,7 +8,7 @@ VIRUS_FOUND {
 }
 # Bad policy from free mail providers
 FREEMAIL_POLICY_FAILURE {
-  expression = "-g+:policies & !DMARC_POLICY_ALLOW & !MAILLIST & ( FREEMAIL_ENVFROM | FREEMAIL_FROM ) & !WHITELISTED_FWD_HOST";
+  expression = "FREEMAIL_FROM & !DMARC_POLICY_ALLOW & !MAILLIST& !WHITELISTED_FWD_HOST & -g+:policies";
   score = 16.0;
 }
 # Applies to freemail with undisclosed recipients