Python Script for Sending Emails with Attachments Using smtplib

The snippet provides a straightforward Python program that creates a multipart email, attaches a plain‑text body and a file, encodes the attachment, and sends the message through an SMTP server using the smtplib library.

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

user = '[email protected]'  # sender email address
pwd = 'xxxxxx'       # sender password
to = ['[email protected]']  # recipient list (can contain multiple addresses)
msg = MIMEMultipart()
msg['Subject'] = '这里是主题...'
content1 = MIMEText('这里是正文！', 'plain', 'utf-8')
msg.attach(content1)
attfile = 'XXXXXXXX/test.txt' # file path of the attachment
basename = os.path.basename(attfile)
fp = open(attfile, 'rb')
att = MIMEText(fp.read(), 'base64', 'utf-8')
att["Content-Type"] = 'application/octet-stream'
att.add_header('Content-Disposition', 'attachment', filename=('gbk', '', basename))
encoders.encode_base64(att)
msg.attach(att)
# -----------------------------------------------------------
s = smtplib.SMTP('smtp.exmail.qq.com')
s.login(user, pwd)
s.sendmail(user, to, msg.as_string())
print('发送成功')
s.close()

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