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diff --git a/Lazymail/Types.hs b/Lazymail/Types.hs
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+{- Common types of Lazymail
+ -
+ - Copyright 2013 Raúl Benencia <rul@kalgan.cc>
+ -
+ - Licensed under the GNU GPL version 3 or higher
+ -}
+
+module Lazymail.Types where
+
+import Codec.MIME.Type(MIMEValue(..))
+import Control.Monad.Reader(ReaderT)
+import Control.Monad.State(StateT)
+import Data.DateTime(DateTime)
+import System.FilePath(FilePath)
+import System.IO(Handle)
+import UI.NCurses(Curses, Update, Color(..), ColorID, Event(..))
+
+type LazymailUpdate = ReaderT LazymailConfig (StateT LazymailState Update)
+type LazymailCurses = ReaderT LazymailConfig (StateT LazymailState Curses)
+
+{- Lazymail monad is a ReaderT around a StateT with IO at the bottom of the
+ - stack.
+ -}
+type Lazymail = ReaderT LazymailConfig (StateT LazymailState IO)
+
+data LazymailConfig = LazymailConfig {
+    baseColor          :: (Color, Color) -- (foreground, background)
+  , selectionColor     :: (Color, Color)
+  , statusBarColor     :: (Color, Color)
+  , headerColor        :: (Color, Color)
+  , newEmailColor      :: (Color, Color)
+  , showStatusBar      :: Bool
+  , initialPath        :: FilePath
+  , filterMaildirsHook :: [FilePath] -> IO [FilePath]
+  , indexDateFormat    :: String
+  , headersToShow      :: [String]
+  , globalKeymaps      :: [Keymap]
+  , maildirModeKeymap  :: [Keymap]
+  , indexModeKeymap    :: [Keymap]
+  , emailModeKeymap    :: [Keymap]
+  , composeModeKeymap  :: [Keymap]
+}
+
+data Email = Email {
+    emailValue  :: MIMEValue
+  , emailDate   :: DateTime
+  , emailPath   :: FilePath
+  , emailHandle :: Handle
+}
+
+instance Eq Email where
+  (Email _ _ fp1 _) == (Email _ _ fp2 _) = fp1 == fp2
+
+instance Ord Email where
+  (Email _ d1 _ _) `compare` (Email _ d2 _ _) = d1 `compare` d2
+
+data Mode = MaildirMode | IndexMode | EmailMode | ComposeMode
+                                                  deriving (Show, Eq)
+
+type Maildir = FilePath
+
+data Flag = NEW
+          | SEEN
+          | ANSWERED
+          | FLAGGED
+          | DELETED
+          | DRAFT
+          | FORWARDED
+          | OTHERFLAG String
+            deriving (Eq)
+
+type Flags = [Flag]
+
+data LazymailState = LazymailState {
+    mode            :: Mode
+  , basePath        :: FilePath
+  , screenRows      :: Int
+  , screenColumns   :: Int
+  , currentRow      :: Int
+  , columnPadding   :: Int
+  , exitRequested   :: Bool
+  , statusBar       :: Bool
+  , maildirState    :: MaildirState
+  , indexState      :: IndexState
+  , emailState      :: EmailState
+  , composeState    :: ComposeState
+  , colorStyle      :: ColorStyle
+}
+
+data MaildirState = MaildirState {
+    selectedRowMD   :: Int
+  , selectedMD      :: String
+  , detectedMDs     :: [(FilePath, String)]
+  , scrollRowMD     :: Int
+  , scrollBufferMD  :: [(FilePath, String)]
+  , triggerUpdateMD :: Bool 
+}
+
+data IndexState = IndexState {
+    selectedRowIn     :: Int
+  , selectedEmailPath :: FilePath
+  , selectedEmails    :: [Email]
+  , scrollRowIn       :: Int
+  , currentInLen      :: Int
+  , scrollBufferIn    :: [(FilePath, String)]
+  , triggerUpdateIn   :: Bool
+}
+
+data ComposeState = ComposeState {
+    composition     :: Maybe String
+}
+
+data EmailState = EmailState {
+    scrollRowEm    :: Int
+  , bodyStartRow   :: Int
+  , emailLines     :: [String]
+  , currentEmail   :: MIMEValue
+}
+
+data ColorStyle = ColorStyle {
+    baseColorID      :: ColorID
+  , selectionColorID :: ColorID
+  , statusBarColorID :: ColorID
+  , headerColorID    :: ColorID
+  , newEmailColorID  :: ColorID
+}
+
+type Keymap = ([Event], LazymailCurses ())
+\ No newline at end of file