Python smtplib发送邮件

#coding:utf-8
import smtplib  
from email.mime.text import MIMEText  # 引入smtplib和MIMEText

host = 'smtp.163.com'  # 设置发件服务器地址
port = 25  # 设置发件服务器端口号。注意，这里有SSL和非SSL两种形式
sender = 'alexkh3@163.com'  # 设置发件邮箱，一定要自己注册的邮箱
pwd = 'XXXXXX'  # 设置发件邮箱的密码，等会登陆会用到
receiver = 'zhangyanan2@tuniu.com' # 设置邮件接收人，这里是我的公司邮箱
body = '<h1>Hi</h1><p>test</p>' # 设置邮件正文，这里是支持HTML的

msg = MIMEText(body, 'html') # 设置正文为符合邮件格式的HTML内容
msg['subject'] = 'Hello world' # 设置邮件标题
msg['from'] = sender  # 设置发送人
msg['to'] = receiver  # 设置接收人

s = smtplib.SMTP(host, port)  # 注意！如果是使用SSL端口，这里就要改为SMTP_SSL
s.login(sender, pwd)  # 登陆邮箱
s.sendmail(sender, receiver, msg.as_string())  # 发送邮件！

print 'over'  # 发送成功就会提示

s = smtplib.SMTP(host, port)
s.login(sender, pwd)
s.sendmail(sender, receiver, msg.as_string())

def sm(receiver, title, body):
        host = 'smtp.163.com'
        port = 25
        sender = 'alexkh3@163.com'
        pwd = 'XXXXXX'

        msg = MIMEText(body, 'html')
        msg['subject'] = title
        msg['from'] = sender
        msg['to'] = receiver

        s = smtplib.SMTP(host, port)
        s.login(sender, pwd)
        s.sendmail(sender, receiver, msg.as_string())

        print 'The mail named %s to %s is sended successly.' % (title, receiver)