[Fix] Do not try to sign unknown domains

diff --git a/lualib/dkim_sign_tools.lua b/lualib/dkim_sign_tools.lua
index 3a34a56824a9114ee4f0c2d910b0442165aca745..0fd6f5618d8fa54730ae23bf384569d9ab1ec1ab 100644 (file)
--- a/lualib/dkim_sign_tools.lua
+++ b/lualib/dkim_sign_tools.lua
@@ -178,6 +178,8 @@ local function prepare_dkim_signing(N, task, settings)
     local data = settings.path_map:get_key(dkim_domain)
     if data then
       p.key = data
+    else
+      return false,{}
     end
   end