Python使用smtplib实现带附件邮件发送的完整示例

沈亦白
沈亦白
发布时间:2026-10-13 | 6人浏览过
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本文提供了基于Python smtplib库发送包含文本、图片及多种附件邮件的完整代码示例。通过解析emailConfig.ini配置文件,实现了SMTP连接、登录及多收件人发送功能。文中对比了旧版与最新版代码,重点解决了附件格式处理问题,并提供了可直接运行的测试脚本,适用于需要自动化邮件通知的开发场景。

本文分享了使用Python标准库smtplib发送邮件的具体实现代码,供读者参考学习。

为解决早期版本中存在的兼容性问题,此处提供经过优化的最新版本代码。

#!/usr/bin/env python 
# coding:gbk 
 
""" 
FuncName: sendemail.py 
Desc: sendemail with text,image,audio,application... 
Date: 2016-06-20 10:30 
Home: http://blog.csdn.net/z_johnny 
Author: johnny 
""" 
 
from email.mime.multipart import MIMEMultipart 
from email.mime.application import MIMEApplication 
from email.utils import COMMASPACE 
from email.mime.text import MIMEText 
from email.mime.image import MIMEImage 
from email.mime.audio import MIMEAudio 
import ConfigParser 
import smtplib 
import os 
 
class MyEmail: 
 def __init__(self, email_config_path, email_attachment_path): 
  """ 
  init config 
  """ 
  config = ConfigParser.ConfigParser() 
  config.read(email_config_path) 
  self.attachment_path = email_attachment_path 
 
  self.smtp = smtplib.SMTP() 
  self.login_username = config.get('SMTP', 'login_username') 
  self.login_password = config.get('SMTP', 'login_password') 
  self.sender = config.get('SMTP', 'login_username') # same as login_username 
  self.receiver = config.get('SMTP', 'receiver') 
  self.host = config.get('SMTP', 'host') 
  #self.port = config.get('SMTP', 'port')  发现加入端口后有时候发邮件出现延迟,故暂时取消 
 
 def connect(self): 
  """ 
  connect server 
  """ 
  #self.smtp.connect(self.host, self.port) 
  self.smtp.connect(self.host) 
 
 def login(self): 
  """ 
  login email 
  """ 
  try: 
   self.smtp.login(self.login_username, self.login_password) 
  except: 
   raise AttributeError('Can not login smtp!!!') 
 
 def send(self, email_title, email_content): 
  """ 
  send email 
  """ 
  msg = MIMEMultipart()     # create MIMEMultipart 
  msg['From'] = self.sender    # sender 
  receiver = self.receiver.split(",")  # split receiver to send more user 
  msg['To'] = COMMASPACE.join(receiver) 
  msg['Subject'] = email_title   # email Subject 
  content = MIMEText(email_content, _charset='gbk') # add email content ,coding is gbk, becasue chinese exist 
  msg.attach(content) 
 
  for attachment_name in os.listdir(self.attachment_path): 
   attachment_file = os.path.join(self.attachment_path,attachment_name) 
 
   with open(attachment_file, 'rb') as attachment: 
    if 'application' == 'text': 
     attachment = MIMEText(attachment.read(), _subtype='octet-stream', _charset='GB2312') 
    elif 'application' == 'image': 
     attachment = MIMEImage(attachment.read(), _subtype='octet-stream') 
    elif 'application' == 'audio': 
     attachment = MIMEAudio(attachment.read(), _subtype='octet-stream') 
    else: 
     attachment = MIMEApplication(attachment.read(), _subtype='octet-stream') 
 
   attachment.add_header('Content-Disposition', 'attachment', filename = ('gbk', '', attachment_name)) 
   # make sure "attachment_name is chinese" right 
   msg.attach(attachment) 
 
  self.smtp.sendmail(self.sender, receiver, msg.as_string()) # format msg.as_string() 
 
 def quit(self): 
  self.smtp.quit() 
 
def send(): 
 import time 
 ISOTIMEFORMAT='_%Y-%m-%d_%A' 
 current_time =str(time.strftime(ISOTIMEFORMAT)) 
 
 email_config_path = './config/emailConfig.ini' # config path 
 email_attachment_path = './result'    # attachment path 
 email_tiltle = 'johnny test'+'%s'%current_time # as johnny test_2016-06-20_Monday ,it can choose only file when add time 
 email_content = 'python发送邮件测试,包含附件' 
 
 myemail = MyEmail(email_config_path,email_attachment_path) 
 myemail.connect() 
 myemail.login() 
 myemail.send(email_tiltle, email_content) 
 myemail.quit() 
 
if __name__ == "__main__": 
 # from sendemail import SendEmail 
 send() 

项目依赖一个名为emailConfig.ini的配置文件,用于存储SMTP服务器参数。

在代码中指定配置文件路径时,需确保路径与程序实际运行目录保持一致。

;login_username : 登陆发件人用户名 
;login_password : 登陆发件人密码 
;host:port : 发件人邮箱对应的host和端口,如:smtp.163.com:25 和 smtp.qq.com:465 
;receiver : 收件人,支持多方发送,格式(注意英文逗号): 123456789@163.com,zxcvbnm@qq.com 

[SMTP] 
login_username = johnny@163.com 
login_password = johnny 
host = smtp.163.com 
port = 25 
receiver = johnny1@qq.com,johnny2@163.com,johnny3@gmail.com 

早期版本代码中存在的一些已知问题如下所述。

#!/usr/bin/env python 
#coding: utf-8 
 
''''' 
FuncName: smtplib_email.py 
Desc: 使用smtplib发送邮件 
Date: 2016-04-11 14:00 
Author: johnny 
''' 
 
import smtplib 
from email.mime.multipart import MIMEMultipart 
from email.mime.text import MIMEText 
from email.mime.base import MIMEBase 
from email.utils import COMMASPACE,formatdate 
from email import encoders 
 
def send_email_text(sender,receiver,host,subject,text,filename): 
  
 assert type(receiver) == list 
 
 msg = MIMEMultipart() 
 msg['From'] = sender 
 msg['To'] = COMMASPACE.join(receiver) 
 msg['Subject'] = subject 
 msg['Date'] = formatdate(localtime=True) 
 msg.attach(MIMEText(text))     #邮件正文内容 
 
 for file in filename:      #邮件附件 
  att = MIMEBase('application', 'octet-stream') 
  att.set_payload(open(file, 'rb').read()) 
  encoders.encode_base64(att) 
  if file.endswith('.html'):    # 若不加限定,jpg、html等格式附件是bin格式的 
   att.add_header('Content-Disposition', 'attachment; filename="今日测试结果.html"')   # 强制命名,名称未成功格式化,如果可以解决请联系我 
  elif file.endswith('.jpg') or file.endswith('.png') : 
   att.add_header('Content-Disposition', 'attachment; filename="pic.jpg"') 
  else: 
   att.add_header('Content-Disposition', 'attachment; filename="%s"' % file) 
  msg.attach(att) 
 
 smtp = smtplib.SMTP(host)   
 smtp.ehlo() 
 smtp.starttls() 
 smtp.ehlo() 
 smtp.login(username,password) 
 smtp.sendmail(sender,receiver, msg.as_string()) 
 smtp.close() 
 
if __name__=="__main__": 
 sender = 'qqq@163.com' 
 receiver = ['www@qq.com'] 
 subject = "测试" 
 text = "johnny'lab test" 
 filename = [u'测试报告.html','123.txt',u'获取的信息.jpg'] 
 host = 'smtp.163.com' 
 username = 'qqq@163.com' 
 password = 'qqq' 
 send_email_text(sender,receiver,host,subject,text,filename) 

经测试验证,使用Header模块并未导致标题显示异常,因此新版代码中未采用该方式。

若发现附件中的HTML、JPG或PNG文件在接收端显示为二进制“bin”格式,请联系作者;该问题已在上述最新版代码中得到解决,希望本文能对大家有所帮助。

点击查看:Python 邮件smtplib发送示例

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