发送邮件的流程

登录我们邮箱，
书写接收者的邮箱，
书写题目与内容，添加附件，
点击发送。

邮件协议

smtp 是邮件发送的协议。pop3 是邮件接收的协议。

smtplib模块用法

创建协议对象：smtpObj = smtplib.SMTP()
创建链接：smtpObj.connect(smtp服务器地址, 25)
登录验证 : smtpObj.login(mail_user, mail_pass)
发送邮件 : smtpObj.sendmail(sender, receivers, message)
message是消息对象的加密字符串

email包

MIMEText：定义邮件发送内容的对象
Header：将各类信息定义成对象，比如标题等

Python代码

首先需要获取邮箱账号的授权码

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email import encoders
from email.header import Header

# config
mail_host = "smtp.sina.com"  # 新浪邮箱的smtp服务器
mail_user = "******"    # 邮箱用户名, 也可以写成******@sina.com
mail_pass = "******"  # 邮箱授权码（在新浪邮箱设置里查看）
sender = "******@sina.com"  # 发件人地址，应与 mail_user 是同一个
receivers = ['******']

'''编辑邮件内容'''
# 使用 MIMEMultipart 创建多部分邮件，允许包含文本和附件
message = MIMEMultipart()
message['From'] = Header(sender)
# message['To'] = Header(', '.join(receivers), 'utf-8')
message['Subject'] = Header('Test Subject', 'utf-8')

# 邮件正文
body = MIMEText('This is a test message with attachment.', 'plain', 'utf-8')
message.attach(body)

# 添加附件
file_path = r'A:\高清无码.mp4'  # 替换为附件文件的路径
attachment_name = 'example.mp4'  # 附件的文件名（相当于给附件重命名）

try:
    with open(file_path, 'rb') as attachment:
        part = MIMEBase('application', 'octet-stream')
        part.set_payload(attachment.read())
        encoders.encode_base64(part)  # 对附件进行Base64编码

        # 设置附件头部信息
        part.add_header('Content-Disposition', f'attachment; filename="{attachment_name}"')

        # 将附件附加到邮件
        message.attach(part)

    # print('[debug] ', message.as_string())

    '''发送邮件'''
    try:
        smtp_obj = smtplib.SMTP()
        smtp_obj.connect(mail_host, 25)  # 连接SMTP服务器
        smtp_obj.login(mail_user, mail_pass)  # 登录
        smtp_obj.sendmail(sender, receivers, message.as_string())  # 发送邮件
        print('[info] email send successfully.')
    except smtplib.SMTPException as e:
        print('[Error] fail to send email: ', e)

except FileNotFoundError:
    print("[Error] attachment file not found.")