docs: def rand_email():
      """Random email.
  
      Usage Example::
  
          >>> rand_email()
          Z4Lljcbdw7m@npa.net
      """
      name = rand_str(random.randint(4, 14), string.ascii_lowercase) + \
             rand_str(random.randint(1, 4), string.digits)
      domain = rand_str(random.randint(2, 10), string.ascii_lowercase)
      surfix = random.choice(DOMAIN_SURFIX)
      return "%s@%s.%s" % (name, domain, surfix)