import smtplib  
from email.mime.text import MIMEText  
mailto_list=["xxx@xx.com"]
mail_host="smtp.xxx.com"  #设置服务器
mail_user="xxx"    #用户名
mail_pass="xxx"   #口令
mail_postfix="xxx.com"  #发件箱的后缀
  
def send_mail(to_list,sub,content):  #to_list：收件人；sub：主题；content：邮件内容
    me="hello"+"<"+mail_user+"@"+mail_postfix+">"   #这里的hello可以任意设置，收到信后，将按照设置显示
    msg = MIMEText(content,_subtype='html',_charset='gb2312')    #创建一个实例，这里设置为html格式邮件
    msg['Subject'] = sub    #设置主题
    msg['From'] = me  
    msg['To'] = ";".join(to_list)  
    s = smtplib.SMTP()
    s.connect(mail_host)  #连接smtp服务器
    s.login(mail_user,mail_pass)  #登陆服务器
    s.sendmail(me, to_list, msg.as_string())  #发送邮件
    s.close()
    return;
send_mail(mailto_list,"hello","hello xxx")