python 利用smtp发送邮件，html格式

def send_mail(to_list, sub, context):#sentmail to the maillist
    '''
    to_list: 发送给谁
    sub: 主题
    context: 内容
    send_mail("xxx@126.com","sub","context")
    '''
    #print 'test begins'
    mail_host = "smtp.163.com"
    mail_user = "admin"
    mail_pass = "123456"
    mail_postfix="163.com"
    

    me = mail_user + "<"+mail_user+"@"+mail_postfix+">"
    msg = MIMEText(context,"html")   #context是邮件内容,这里content就可以是带上html的tag了，
    msg['Subject'] = sub　　　　　　#邮件标题
    msg['From'] = me　　　　　　#邮件发送来自于
    msg['To'] = ";".join(to_list)#邮件发送给谁


    send_smtp = smtplib.SMTP(mail_host)#连接smtp服务器
    send_smtp.login(mail_user, mail_pass)#登陆
   # print send_smtp
    send_smtp.sendmail(me, to_list, msg.as_string())#发送邮件
    send_smtp.close()
    return True