docs: def sendmail(array):
      """function for read data in db and send mail
      """
      username = 'root@robin8.io'
      FROM = username
      TO = [array["to"]]
      SUBJECT = array["subject"]
      # check on correct data in optional
      if type(array["optional"]) == str and array["optional"]:
          TEXT = array["optional"]
      else:
          return "Error: missed argument"
      # make template
      message = """From: %s\nTo: %s\nSubject: %s\n\n%s""" % (FROM, ", ".join(TO), SUBJECT, TEXT)
      try:
          server = smtplib.SMTP('localhost')
          logging.info(server)
          #server.ehlo()
          #server.starttls()
          # authorizing user, must setup your account
          #server.login(username, password)
          # send mail
          server.sendmail(FROM, TO, message)
          server.quit()
          logging.info(message)
          return "Success"
      except:
          return "Error"