如何使用python向多个人发送邮件？

#! /usr/bin/env python#coding=utf-
8from email.mime.text import MIMETextfrom email.header import Headerfrom smtplib import SMTP_SSL#qq邮箱smtp服务器
host_server = 'smtp.qq.com'#sender_qq为发件人的qq号码sender_qq = '7697****@qq.com'#pwd为qq邮箱的授权码
pwd = 'h**********bdc' ## h**********bdc#发件人的邮箱
sender_qq_mail = '7697****@qq.com'#收件人邮箱receivers = ['yiibai.com@gmail.com','****su@gmail.com']#邮件的正文内容mail_content = '你好，这是使用python登录qq邮箱发邮件的测试'
#邮件标题mail_title = 'Maxsu的邮件'
#ssl登录smtp = SMTP_SSL(host_server)
#set_debuglevel()是用来调试的。参数值为1表示开启调试模式，参数值为0关闭调试模式smtp.set_debuglevel(1)
smtp.ehlo(host_server)
smtp.login(sender_qq, pwd)

msg = MIMEText(mail_content, "plain", 'utf-8')

msg["Subject"] = Header(mail_title, 'utf-8')

msg["From"] = sender_qq_mail

msg["To"] = Header("接收者测试", 'utf-8') ## 接收者的别名smtp.sendmail(sender_qq_mail, receivers, msg.as_string())

smtp.quit()