input: Write a function to validate a list of emails. The function should return a boolean indicating whether a given email address is valid. The function should ensure that each email adheres to the standard email format, which includes an @ symbol and a valid domain. If the given list is empty, the function should return True.
  
  assert validate_mail_list(["example.user@gmail.com", "bad@example"])==False
  assert validate_mail_list(["user@domain.com", "another.user@anotherdomain.com"])==True
  assert validate_mail_list(["user@domain", "anotheruser@domain.com"])==False
  assert validate_mail_list([])==True
output: def validate_mail_list(emails):
      if not emails:
          return True
      for email in emails:
          if '@' not in email or '.' not in email.split('@')[1]:
              return False
      return True