django 发送邮件认证错误 但是使用 stmp 模块没有问题，怎么回事？

使用 django 发邮件一直报认证错误 (535, 'Error: authentication failed')，但是用 stmp 模块登录发送邮件没有问题，使同一个账户，密码也使用一样的，但是用 django 发送的时候会报错怎么回事？ stmp 代码如下，可以正常的发送

 msg['to'] = '[email protected]'
 msg['from'] = '[email protected]'
 msg['subject'] = 'receive or ship parts'
 try:
     server = smtplib.SMTP('smtp.163.com')
     server.login('[email protected]','xxxxx555')
     server.sendmail(msg['from'],msg['to'],msg.as_string())
     server.quit()
     print 'successfully'
 except Exception, e:
     print str(e)
if __name__=='__main__':
 sendmail(item_list,meta_dict)

django setting 代码如下：

EMAIL_USE_TLS = True

EMAIL_HOST = 'smtp.163.com'

EMAIL_HOST_USER = '[email protected]'

EMAIL_HOST_PASSWORD = 'xxxxx555'

EMAIL_PORT = 25

email 函数如下：

template_html = get_template('email.html')
    context = Context({'user': user, 'other_info': info})
    if not user.e
    try:
        subject, from_email, to = 'hello world', '[email protected]', '[email protected]'
        text_content = 'This is an import message.'
        html_content = '<p>This is an <strong>important</strong> message.</p>'
        msg = EmailMultiAlternatives(subject, text_content, from_email, [to])
        msg.attach_alternative(html_content, "text/html")
        msg.send()
        print 'sucessful'
    except Exception, e:
        print 'failed', e