python3通过qq邮箱发送邮件以及附件

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart


def Mailer(to_list,th1=None,Subject=None,unipath=None):

 mail_host = 'smtp.qq.com'  # 邮箱服务器
 mail_user = 'dalu@qq.com' # 发件人邮箱密码(当时申请smtp给的口令)
 mail_pwd = '***********' # SMTP密码
 s = smtplib.SMTP_SSL(mail_host, 465,timeout=5)
 s.login(mail_user, mail_pwd)
 #邮件内容
 mail = str(th1)
 msg = MIMEMultipart()
 msgtext = MIMEText(mail.encode('utf8'), _subtype='html', _charset='utf8')
 msg['From'] = mail_user
 msg['Subject'] = Subject
 msg['To'] = ",".join(to_list)

 if unipath is not None:
  att1 = MIMEText(open(unipath, 'rb').read(), 'base64', 'gb2312')
  att1["Content-Type"] = 'application/octet-stream'
  att1.add_header('Content-Disposition', 'attachment',filename=(Subject+ '.xlsx'))
  msg.attach(att1)
 msg.attach(msgtext)
 try:
  s.sendmail(mail_user, to_list, msg.as_string())
  s.close()
  print('发送成功')
 except Exception as e:
  print(e)

to_list = [
 #多用户使用的list
 'dalu@qq.com',
]

Mailer(to_list,th1="这是要发的邮件内容",Subject='邮件标题',unipath=r'F:\test.xlsx')