diff --git a/src/App/AuthenticationInterface.purs b/src/App/AuthenticationInterface.purs
index 1ab3e12..c50dcae 100644
--- a/src/App/AuthenticationInterface.purs
+++ b/src/App/AuthenticationInterface.purs
@@ -2,11 +2,12 @@
 -- | TODO: token validation.
 module App.AuthenticationInterface where
 
-import Prelude (Unit, bind, discard, pure, ($), (<<<), (<>), (>), (==))
+import Prelude (Unit, bind, discard, pure, ($), (<<<), (<>), (>), (==), map, show)
 
 import Data.Array as A
 import Data.ArrayBuffer.Types (ArrayBuffer)
-import Data.Maybe (Maybe(..))
+import Data.Maybe (Maybe(..), maybe)
+import Data.Either (Either(..))
 import Data.Tuple (Tuple(..))
 import Effect.Aff.Class (class MonadAff)
 import Halogen as H
@@ -18,14 +19,23 @@ import Web.Event.Event (Event)
 
 import Bulma as Bulma
 
-import App.Email as Email
 import App.LogMessage
 import App.Messages.AuthenticationDaemon as AuthD
 
+import App.Validation.Login as L
+import App.Validation.Email as E
+import App.Validation.Password as P
+
 type Login = String
+type Email = String
 type Password = String
 type PasswordRecoveryToken = String
 
+data Error
+  = Login (Array L.Error)
+  | Email    (Array E.Error)
+  | Password (Array P.Error)
+
 -- | The component can inform the parent (`App.Container`) that the authentication is complete,
 -- | and share both the uid and token. The token is useful to authenticate the user to the
 -- | dnsmanager daemon.
@@ -38,6 +48,7 @@ data Output
   | AuthenticateToAuthd (Tuple Login Password)
   | Log LogMessage
   | PasswordRecovery Login PasswordRecoveryToken Password
+  | AskPasswordRecovery (Either Email Login)
 
 -- | The component's parent provides received messages.
 -- |
@@ -82,9 +93,19 @@ type State =
   { authenticationForm     :: StateAuthenticationForm
   , passwordRecoveryForm   :: StatePasswordRecoveryForm
   , newPasswordForm        :: StateNewPasswordForm
+  , errors                 :: Array Error
   , wsUp                   :: Boolean
   }
 
+initialState :: Input -> State
+initialState _ =
+  { authenticationForm:   { login: "", pass:  "" }
+  , passwordRecoveryForm: { login: "", email: "" }
+  , newPasswordForm: { login: "", token: "", password: "", confirmation: "" }
+  , wsUp: true
+  , errors: []
+  }
+
 component :: forall m. MonadAff m => H.Component Query Input Output m
 component =
   H.mkComponent
@@ -96,25 +117,66 @@ component =
         }
     }
 
-initialState :: Input -> State
-initialState _ =
-  { authenticationForm:   { login: "", pass:  "" }
-  , passwordRecoveryForm: { login: "", email: "" }
-  , newPasswordForm: { login: "", token: "", password: "", confirmation: "" }
-  , wsUp: true
-  }
-
 render :: forall m. State -> H.ComponentHTML Action () m
-render { wsUp, authenticationForm, passwordRecoveryForm, newPasswordForm} =
+render { wsUp, authenticationForm, passwordRecoveryForm, newPasswordForm, errors } =
   Bulma.section_small
     [ case wsUp of
         false -> Bulma.p "You are disconnected."
-        true  -> Bulma.columns_ [ b auth_form, b passrecovery_form, b newpass_form ]
+        true  ->
+          if A.length errors > 0
+          then HH.div_ [ Bulma.box [ HH.text (A.fold $ map show_error errors) ]
+                       , Bulma.columns_ [ b auth_form, b passrecovery_form, b newpass_form ]
+                       ]
+          else Bulma.columns_ [ b auth_form, b passrecovery_form, b newpass_form ]
     ]
 
   where
     b e = Bulma.column_ [ Bulma.box e ]
 
+    show_error :: Error -> String
+    show_error = case _ of
+      Login arr -> "Error with the Login: " <> (A.fold $ map show_error_login arr)
+      Email    arr -> "Error with the Email: "    <> (A.fold $ map show_error_email arr)
+      Password arr -> "Error with the Password: " <> (A.fold $ map show_error_password arr)
+
+    show_error_login :: L.Error -> String
+    show_error_login = case _ of
+      L.ParsingError {error, position} ->
+        "position " <> show position <> " " <> maybe "" string_error_login error
+
+    string_error_login :: L.LoginParsingError -> String
+    string_error_login = case _ of
+      L.CannotParse         -> "cannot parse the login"
+      L.CannotEntirelyParse -> "cannot entirely parse the login"
+      L.Size min max n      -> "login size should be between "
+                               <> show min <> " and " <> show max
+                               <> " (currently: " <> show n <> ")"
+    show_error_email :: E.Error -> String
+    show_error_email = case _ of
+      E.ParsingError {error, position} ->
+        "position " <> show position <> " " <> maybe "" string_error_email error
+    
+    string_error_email :: E.EmailParsingError -> String
+    string_error_email = case _ of
+      E.CannotParse         -> "cannot parse the email"
+      E.CannotEntirelyParse -> "cannot entirely parse the email"
+      E.Size min max n      -> "email size should be between "
+                               <> show min <> " and " <> show max
+                               <> " (currently: " <> show n <> ")"
+    
+    show_error_password :: P.Error -> String
+    show_error_password = case _ of
+      P.ParsingError {error, position} ->
+        "position " <> show position <> " " <> maybe "" string_error_password error
+    
+    string_error_password :: P.PasswordParsingError -> String
+    string_error_password = case _ of
+      P.CannotParse         -> "cannot parse the password"
+      P.CannotEntirelyParse -> "cannot entirely parse the password"
+      P.Size min max n      -> "password size should be between "
+                               <> show min <> " and " <> show max
+                               <> " (currently: " <> show n <> ")"
+
     auth_form         = [ Bulma.h3 "Authentication"   , render_auth_form ]
     passrecovery_form = [ Bulma.h3 "Password Recovery", render_password_recovery_form ]
     newpass_form      = [ Bulma.h3 "New password", render_new_password_form ]
@@ -207,31 +269,23 @@ handleAction = case _ of
     H.liftEffect $ Event.preventDefault ev
 
     { authenticationForm } <- H.get
+    let { login, pass } = authenticationForm
 
-    case authenticationForm.login, authenticationForm.pass of
+    case login, pass of
       "" , _ ->
         H.raise $ Log $ UnableToSend "Write your login!"
 
       _ , "" ->
         H.raise $ Log $ UnableToSend "Write your password!"
 
-      login, pass -> do
-        H.raise $ AuthenticateToAuthd (Tuple login pass)
+      _, _ -> do
+        case L.login login, P.password pass of
+          Left errors, _ -> H.modify_ _ { errors = [ Login    errors ] }
+          _, Left errors -> H.modify_ _ { errors = [ Password errors ] }
+          _, _            -> do H.modify_ _ { errors = [] }
+                                H.raise $ AuthenticateToAuthd (Tuple login pass)
         H.raise $ Log $ SystemLog $ "authenticate (login: " <> login <> ")"
 
-  -- TODO: verify the login?
-  NewPasswordAttempt ev -> do
-    H.liftEffect $ Event.preventDefault ev
-
-    { newPasswordForm } <- H.get
-    let { login, token, password, confirmation} = newPasswordForm
-
-    if A.any (_ == "") [ login, token, password, confirmation ]
-    then H.raise $ Log $ ErrorLog "All entries are required!"
-    else if password == confirmation
-         then H.raise $ PasswordRecovery login token password
-         else H.raise $ Log $ UnableToSend "Confirmation differs from password!"
-
   PasswordRecoveryAttempt ev -> do
     H.liftEffect $ Event.preventDefault ev
 
@@ -242,10 +296,32 @@ handleAction = case _ of
     case login, email of
       "", "" -> H.raise $ Log $ UnableToSend "Write your login or your email!"
       _, _ -> do
-        message <- H.liftEffect $ AuthD.serialize $
-          AuthD.MkAskPasswordRecovery { user: (Just login), email: Just (Email.Email email) }
-        H.raise $ MessageToSend message
         H.raise $ Log $ SystemLog "password recovery"
+        if email == ""
+        then case L.login login of
+               Left errors -> H.modify_ _ { errors = [ Login errors ] }
+               _           -> do H.modify_ _ { errors = [] }
+                                 H.raise $ AskPasswordRecovery (Right login)
+        else case E.email email of
+               Left errors -> H.modify_ _ { errors = [ Email errors ] }
+               _           -> do H.modify_ _ { errors = [] }
+                                 H.raise $ AskPasswordRecovery (Left email)
+
+  -- TODO: verify the login?
+  NewPasswordAttempt ev -> do
+    H.liftEffect $ Event.preventDefault ev
+
+    { newPasswordForm } <- H.get
+    let { login, token, password, confirmation} = newPasswordForm
+
+    if A.any (_ == "") [ login, token, password, confirmation ]
+    then H.raise $ Log $ ErrorLog "All entries are required!"
+    else if password == confirmation
+         then case L.login login of
+                Left errors -> H.modify_ _ { errors = [ Login errors ] }
+                Right _     -> do H.modify_ _ { errors = [] }
+                                  H.raise $ PasswordRecovery login token password
+         else H.raise $ Log $ UnableToSend "Confirmation differs from password!"
 
 handleQuery :: forall a m. MonadAff m => Query a -> H.HalogenM State Action () Output m (Maybe a)
 handleQuery = case _ of
diff --git a/src/App/Container.purs b/src/App/Container.purs
index 6e0f0be..b1684e7 100644
--- a/src/App/Container.purs
+++ b/src/App/Container.purs
@@ -77,6 +77,8 @@ import Web.HTML (window) as HTML
 import Web.HTML.Window (sessionStorage) as Window
 import Web.Storage.Storage as Storage
 
+import App.Email as Email
+
 import App.LogMessage (LogMessage(..))
 
 import App.Pages
@@ -341,6 +343,15 @@ handleAction = case _ of
 
   AuthenticationInterfaceEvent ev -> case ev of
     AI.MessageToSend message  -> H.tell _ws_auth unit (WS.ToSend message)
+    AI.AskPasswordRecovery e -> case e of
+      Left  email -> do
+        message <- H.liftEffect $ AuthD.serialize $
+          AuthD.MkAskPasswordRecovery { user: Nothing, email: Just (Email.Email email) }
+        H.tell _ws_auth unit (WS.ToSend message)
+      Right login -> do
+        message <- H.liftEffect $ AuthD.serialize $
+          AuthD.MkAskPasswordRecovery { user: (Just login), email: Nothing }
+        H.tell _ws_auth unit (WS.ToSend message)
     AI.PasswordRecovery login token pass -> do
       message <- H.liftEffect $ AuthD.serialize $ AuthD.MkPasswordRecovery
         { user: login
diff --git a/src/App/RegistrationInterface.purs b/src/App/RegistrationInterface.purs
index cf6bdb3..28e0e8d 100644
--- a/src/App/RegistrationInterface.purs
+++ b/src/App/RegistrationInterface.purs
@@ -71,6 +71,13 @@ type State =
   , wsUp             :: Boolean
   }
 
+initialState :: Input -> State
+initialState _ =
+  { registrationForm: { login: "", email: "", pass: "" }
+  , errors: []
+  , wsUp: true
+  }
+
 component :: forall m. MonadAff m => H.Component Query Input Output m
 component =
   H.mkComponent
@@ -82,13 +89,6 @@ component =
         }
     }
 
-initialState :: Input -> State
-initialState _ =
-  { registrationForm: { login: "", email: "", pass: "" }
-  , errors: []
-  , wsUp: true
-  }
-
 render :: forall m. State -> H.ComponentHTML Action () m
 render { wsUp, registrationForm }
   = Bulma.section_small
diff --git a/src/App/Setup.purs b/src/App/Setup.purs
index a37a0da..4c39f5c 100644
--- a/src/App/Setup.purs
+++ b/src/App/Setup.purs
@@ -117,9 +117,8 @@ render { modal, wsUp, newPasswordForm } =
     ]
 
   render_delete_account_modal = Bulma.modal "Delete your account"
-    -- TODO: body content
-    [ Bulma.p "Wait, this is serious"
-    , Bulma.strong "⚠ You won't be able to recover."
+    [ Bulma.p "Your account and domains will be removed."
+    , Bulma.strong "⚠ You won't be able to recover your data."
     ]
     [ Bulma.alert_btn "GO AHEAD LOL" DeleteAccount
     , Bulma.cancel_button CancelModal
diff --git a/src/App/Validation/Password.purs b/src/App/Validation/Password.purs
index 19beea2..7659428 100644
--- a/src/App/Validation/Password.purs
+++ b/src/App/Validation/Password.purs
@@ -21,7 +21,7 @@ data Error
   = ParsingError (G.Error PasswordParsingError)
 
 min_password_size :: Int
-min_password_size = 1
+min_password_size = 2
 max_password_size :: Int
 max_password_size = 100