Python如何实现自动发送邮件

import smtplib

smtp = smtplib.SMTP()
smtp.connect(host, port)  # 与服务器进行连接
smtp.set_debuglevel(1) #显示出交互信息
smtp.login(username, password)  # 登陆邮箱
smtp.sendmail(sender, receiver, msg.as_string())  # 发送邮件
smtp.quit()  # 断开连接

import smtplib
from email.mime.multipart import MIMEMultipart 
from email import encoders
from email.header import Header
from email.mime.text import MIMEText
from email.utils import parseaddr, formataddr
from email.mime.application import MIMEApplication

#发件人邮箱
asender="zhangjunhongdata@163.com"
#收件人邮箱
areceiver="zhangjunhong@163.com"
#抄送人邮箱
acc = 'zhangjunhong@qq.com'
#邮件主题
asubject = '这是一份测试邮件'  

#发件人地址
from_addr = "zhangjunhongdata@163.com"
#邮箱密码（授权码）
password="123data"

#邮件设置
msg = MIMEMultipart()
msg['Subject'] = asubject  
msg['to'] = areceiver  
msg['Cc'] = acc 
msg['from'] =  "张俊红"

#邮件正文
body = "你好，这是一份测试邮件"

#添加邮件正文:
msg.attach(MIMEText(body, 'plain', 'utf-8'))

#添加附件
#注意这里的文件路径是斜杠
xlsxpart = MIMEApplication(open('C:/Users/zhangjunhong/Desktop/这是附件.xlsx', 'rb').read())
xlsxpart.add_header('Content-Disposition', 'attachment', filename='这是附件.xlsx')
msg.attach(xlsxpart)    

#设置邮箱服务器地址以及端口
smtp_server ="smtp.163.com"
server = smtplib.SMTP(smtp_server, 25)
server.set_debuglevel(1)

#登陆邮箱
server.login(from_addr, password)

#发送邮件
server.sendmail(from_addr, areceiver.split(',')+acc.split(','), msg.as_string())

#断开服务器链接
server.quit()

import smtplib
from email.mime.multipart import MIMEMultipart 
from email.mime.text import MIMEText
from email.mime.image import MIMEImage
from email.mime.application import MIMEApplication

host = "smtp.163.com"
port = 25
username = "zhangjunhong1227@163.com"
password = "123zjh"

smtp = smtplib.SMTP() #声明一个链接对象
smtp.connect(host, port)  # 与服务器进行连接
smtp.set_debuglevel(1) #显示出交互信息
smtp.login(username, password)  # 登陆邮箱

sender = username

for i in zip(df["姓名"],df["收件人"],df["抄送人"]):
    
    receiver = i[1] #收件人
    acc = i[2] #抄送人


    msg = MIMEMultipart() #声明一个邮件对象
    msg['from'] = username #发件人
    msg['to'] = receiver#收件人
    msg['Cc'] = acc #抄送人
    msg['Subject'] = i[0] + "任务明细" #主题

    # 编写正文
    text = MIMEText(i[0]+"您好，这是您这个月的任务明细",'plain', 'utf-8') 
    msg.attach(text)

    # 添加表格附件
    f = open('C:/Users/zhangjunhong/Desktop/任务明细/'+ i[0] + '.xlsx', 'rb').read()
    filepart = MIMEApplication(f)
    filepart.add_header('Content-Disposition','attachment',filename=i[0] + '任务明细.xlsx') #为附件添加一个标题
    msg.attach(filepart)

    smtp.sendmail(sender, receiver.split(',') + acc.split(','), msg.as_string())  # 发送邮件
smtp.quit()  # 断开连接