# File email/lib/symbiosis/domain/mailbox.rb, line 32
      def initialize(local_part, domain, mailboxes_dir="mailboxes")

        raise ArgumentError, "Not a valid local_part" unless Mailbox.valid_local_part?(local_part)
        raise ArgumentError, "Not a Domain" unless domain.is_a?(Domain)

        @local_part    = local_part
        @domain        = domain
        @mailboxes_dir = mailboxes_dir
        @encrypt_password = true
        @password      = nil
        @local_user    = nil
      end