电子邮件的任何附件都需要由收件人以正确的格式保存

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email import encoders

# 配置SMTP服务器信息
smtp_server = 'smtp.example.com'
smtp_port = 587
sender_email = 'sender@example.com'
receiver_email = 'receiver@example.com'
password = 'your_password'

# 创建邮件对象
msg = MIMEMultipart()
msg['From'] = sender_email
msg['To'] = receiver_email
msg['Subject'] = 'Test Email with Attachment'

# 添加附件
filename = 'example.txt'
attachment = open(filename, 'rb')
part = MIMEBase('application', 'octet-stream')
part.set_payload((attachment).read())
encoders.encode_base64(part)
part.add_header('Content-Disposition', "attachment; filename= %s" % filename)
msg.attach(part)

# 发送邮件
server = smtplib.SMTP(smtp_server, smtp_port)
server.starttls()
server.login(sender_email, password)
text = msg.as_string()
server.sendmail(sender_email, receiver_email, text)
server.quit()