diff --git a/src/App/DomainListInterface.purs b/src/App/DomainListInterface.purs
index c9909f1..745e873 100644
--- a/src/App/DomainListInterface.purs
+++ b/src/App/DomainListInterface.purs
@@ -11,7 +11,7 @@
 
 module App.DomainListInterface where
 
-import Prelude (Unit, bind, discard, map, otherwise, pure, ($), (/=), (<<<), (<>))
+import Prelude (Unit, bind, discard, map, otherwise, pure, ($), (/=), (<<<), (<>), show)
 
 import Data.Array as A
 import Data.ArrayBuffer.Types (ArrayBuffer)
@@ -29,6 +29,9 @@ import Web.Event.Event (Event)
 import Bulma as Bulma
 import CSSClasses as C
 
+import Parsing (runParser)
+import DomainParser as DomainParser
+
 import App.LogMessage
 import App.Messages.DNSManagerDaemon as DNSManager
 
@@ -108,6 +111,7 @@ data Action
 
 type NewDomainFormState
   = { new_domain      :: String
+    , error_string    :: Maybe String
     , selected_domain :: String
     }
 
@@ -144,6 +148,7 @@ default_domain = "netlib.re"
 initialState :: Input -> State
 initialState _ =
   { newDomainForm: { new_domain: ""
+                   , error_string: Nothing
                    , selected_domain: default_domain
                    }
   , accepted_domains: [ default_domain ]
@@ -198,7 +203,7 @@ render { accepted_domains, my_domains, newDomainForm, wsUp, active_modal }
 
     newdomain_form
       = [ Bulma.h3 "Add a domain!"
-        , render_adduser_form
+        , render_add_domain_form
         ]
 
     list_of_own_domains
@@ -221,13 +226,16 @@ render { accepted_domains, my_domains, newDomainForm, wsUp, active_modal }
             [ HH.text domain ]
         ]
 
-    render_adduser_form = HH.form
+    render_add_domain_form = HH.form
       [ HE.onSubmit NewDomainAttempt ]
       [ Bulma.new_domain_field
           (HandleNewDomainInput <<< INP_newdomain)
           newDomainForm.new_domain
           [ HHE.onSelectedIndexChange domain_choice ]
           accepted_domains
+      , case newDomainForm.error_string of
+          Nothing -> HH.div_ []
+          Just str -> Bulma.strong str
       ]
 
     domain_choice :: Int -> Action
@@ -254,7 +262,11 @@ handleAction = case _ of
 
   HandleNewDomainInput adduserinp -> do
     case adduserinp of
-      INP_newdomain        v      -> H.modify_ _ { newDomainForm { new_domain = v } }
+      INP_newdomain        v      -> do
+        H.modify_ _ { newDomainForm { new_domain = v } }
+        case runParser v DomainParser.domain of
+          Left error_string -> H.modify_ _ { newDomainForm { error_string = Just $ show error_string } }
+          Right _           -> H.modify_ _ { newDomainForm { error_string = Nothing } }
       UpdateSelectedDomain domain -> H.modify_ _ { newDomainForm { selected_domain = domain } }
 
   EnterDomain domain -> do