Python发送邮件带附件完整示例

用Python smtplib加MIMEBase发送带附件的邮件，支持PDF、Excel、图片等任意类型文件，附完整可运行代码与文件名中文乱码解决。

场景痛点

每天把报表打包成Excel或PDF后，还要手动登录邮箱、写正文、上传附件、点发送，一天重复十几遍。用Python把正文和附件一起塞进一封邮件，脚本一跑就发完，文件名还能自动按日期命名。

用到的库

smtplib、email都是标准库，无需pip安装。

# 无需安装

完整代码

# -*- coding: utf-8 -*-
import smtplib
import os
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.base import MIMEBase
from email import encoders
from email.header import Header

SMTP_SERVER = "smtp.qq.com"
SMTP_PORT = 465
SENDER = "your_account@qq.com"
AUTH_CODE = "your_smtp_auth_code"
RECEIVER = "receiver@example.com"


def send_with_attachment(attachment_path):
# 1. 用MIMEMultipart把正文和附件打包到一封邮件里
msg = MIMEMultipart()
msg["From"] = Header(f"我的邮箱 <{SENDER}>", "utf-8")
msg["To"] = Header(RECEIVER, "utf-8")
msg["Subject"] = Header("每日报表（带附件）", "utf-8")

# 2. 邮件正文
body = "你好，\n\n附件是今日报表，请查收。"
msg.attach(MIMEText(body, "plain", "utf-8"))

# 3. 读取附件并作为base64编码加入邮件
filename = os.path.basename(attachment_path)
with open(attachment_path, "rb") as f:
part = MIMEBase("application", "octet-stream")
part.set_payload(f.read())
encoders.encode_base64(part)
# 关键：用Header对中文文件名编码，否则对方收到是乱码文件名
part.add_header(
"Content-Disposition",
"attachment",
filename=("utf-8", "", filename)
)
msg.attach(part)

# 4. 登录发送
server = smtplib.SMTP_SSL(SMTP_SERVER, SMTP_PORT)
server.login(SENDER, AUTH_CODE)
server.sendmail(SENDER, [RECEIVER], msg.as_string())
server.quit()
print("带附件邮件发送成功")


if __name__ == "__main__":
send_with_attachment("/path/to/daily_report.xlsx")