class EventMachine::Protocols::SmtpClient

def invoke_starttls
  if @args[:starttls]
    # It would be more sociable to first ask if @server_caps contains
    # the string "STARTTLS" before we invoke it, but hey, life's too short.
    send_data "STARTTLS\r\n"
    @responder = :receive_starttls_response
  else
    invoke_auth
  end
end