[Rspamd] Disable upstream checks for SIEVE_HOST

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

@@ -38,5 +38,5 @@ RBL_EXCLUDE_FWD_HOST {
   expression = "-WHITELISTED_FWD_HOST & ^g:rbl"
 }
 UPSTREAM_CHECKS_EXCLUDE_FWD_HOST {
-  expression = "-WHITELISTED_FWD_HOST & (^UNITEDINTERNET_SPAM | ^SPAM_FLAG | ^KLMS_SPAM | ^AOL_SPAM | ^MICROSOFT_SPAM)"
+  expression = "(-SIEVE_HOST | -WHITELISTED_FWD_HOST) & (^UNITEDINTERNET_SPAM | ^SPAM_FLAG | ^KLMS_SPAM | ^AOL_SPAM | ^MICROSOFT_SPAM)"
 }