NSObject
  NGImap4Client
  NGImap4Context < NGImap4ResponseReceiver >
  NGImap4Folder < NGImap4Folder >
  NGImap4Message
  NGImap4ResponseParser
  NGImap4ServerRoot < NGImap4Folder >
  NGSieveClient

EODataSource
  NGImap4DataSource
NGFileManager
  NGImap4FileManager

NSException
  NGImap4Exception
    NGImap4ParserException
    NGImap4ConnectionException
    NGImap4ResponseException
    NGImap4SearchException

Categories

NSCalendarDate(RFC822Dates)
NSString(Imap4)