python使用smtplib和email库发送邮件

国内很多服务器提供商都默认禁止了smtp默认的25端口服务，而启用465端口发送邮件

在smtplib库中直接调用SMTP_SSL就是默认使用465端口

示例代码如下：

def send_eamil(receiver):
    global msg
    sender = 'xxx@163.com'
    psd = 'xxx'    #是授权密码不是邮箱登录密码
    mail_host='smtp.163.com'
    subject='xxx'
    to_addrs=receiver.split(',')
    #创建带附件的实例
    msg=MIMEMultipart()
    msg['Subject']=Header(subject,'utf-8')
    msg['from']=Header(sender,'utf-8')
    msg['To']=",".join(to_addrs)      #多个收件人
    #创建正文，把文本添加到msg类中
    msg.attach(MIMEText('Push test','plain','utf-8'))
    print('set ok')
#     #构造附件
#     file_path='文件路径'
#     att1=MIMEText(open(file_path,'rb').read(),
#                   'base64','utf-8')
#     #att1["Content-Type"]='application/octet-stream;name=%s'%Header(filename,'utf-8').encode('utf-8')         #与下边功能一致
#     #att1["Content-Disposition"]='attachment;file_name=%s'%Header('%s'%filename,'utf-8').encode('utf-8')      #与下边功能一致
#     att1.add_header('Content-Disposition', 'attachment', filename=名字随便起)#没有这三行会出现文件结尾变成bin现象
#     att1.add_header('Content-ID', '<0>')
#     att1.add_header('X-Attachment-Id', '0')
#     msg.attach(att1)#将附件添加到类文件
    try:
        smtp=SMTP_SSL(mail_host)
        smtp.set_debuglevel(1)  #显示发送过程
#         smtp.connect(mail_host)
        print('connect ok')
        smtp.login(sender,psd)
        smtp.sendmail(sender,to_addrs,msg.as_string())
        smtp.quit()
        print('发送成功')
    except Exception as result:
        print('发送失败，异常为%s'%result)

if __name__ == '__main__':
#     make_excel()
    send_eamil('xxx@xx.com')