class EventMachine::Protocols::SmtpServer

def process_starttls
  if @@parms[:starttls]
    if @state.include?(:starttls)
      send_data "503 TLS Already negotiated\r\n"
    elsif ! @state.include?(:ehlo)
      send_data "503 EHLO required before STARTTLS\r\n"
    else
      send_data "220 Start TLS negotiation\r\n"
      start_tls(@@parms[:starttls_options] || {})
      @state << :starttls
    end
  else
    process_unknown
  end
end