class Mail::IMAP

def validate_options(options)
  options = options ? Hash[options] : {}
  options[:mailbox] ||= 'INBOX'
  options[:count]   ||= 10
  options[:order]   ||= :asc
  options[:what]    ||= :first
  options[:keys]    ||= 'ALL'
  options[:uid]     ||= nil
  options[:delete_after_find] ||= false
  options[:mailbox] = Net::IMAP.encode_utf7(options[:mailbox])
  options[:read_only] ||= false
  options
end