mailru.py backend in user_data(): md5(''.join(param_list) + secret).hexdigest() should be md5((''.join(param_list) + secret).encode('utf-8')).hexdigest()
mailru.py backend in user_data():
md5(''.join(param_list) + secret).hexdigest()
should be
md5((''.join(param_list) + secret).encode('utf-8')).hexdigest()