python 发送及抄送邮件

import smtplib    
from email.mime.multipart import MIMEMultipart    
from email.mime.text import MIMEText    
from email.mime.image import MIMEImage 
from email.header import Header

smtpserver = 'smtp.exmail.qq.com'#你的邮箱服务地址STR
username = #你的邮箱名STR
password=#你的邮箱密码STR
sender=#发送邮箱STR

To_receiver=['[email protected]']#接收邮箱（list）
Cc_receiver=['[email protected]']#抄送邮箱（list）
receiver=To_receiver+Cc_receiver

subject =#邮件主题

msg = MIMEMultipart('mixed') #固定格式无需修改
msg['Subject'] = subject
msg['From'] = sender
msg['To'] = ";".join(To_receiver)
msg['Cc'] = ";".join(To_receiver)

#邮件内容
html = """

    
    
    
先生/女士，您好！

    祝工作愉快！

    
    

"""
text_html = MIMEText(html,'html', 'utf-8')
#text_html["Content-Disposition"] = 'attachment; filename="测试附件2.html"'
msg.attach(text_html)

#构造附件(-pd.to_timedelta("1 day")减一天)
sendfile=open(r'文件路径','rb').read()
text_att = MIMEText(sendfile, 'base64', 'GB18030') 
text_att["Content-Type"] = 'application/octet-stream'
text_att.add_header('Content-Disposition', 'attachment', filename="%s" %Header("附件名称",'utf-8').encode())
msg.attach(text_att)

#发送邮件
smtp = smtplib.SMTP()
smtp.connect(smtpserver)
#我们用set_debuglevel(1)就可以打印出和SMTP服务器交互的所有信息。
#smtp.set_debuglevel(1)
smtp.login(username, password)
smtp.sendmail(sender, receiver, msg.as_string())
smtp.quit()