概述

class SendEmail:
    # 构造函数：初始化基本信息
    def __init__(self,host,user,passwd):
        lInfo = user.split("@")
        self._user = user
        self._account = lInfo[0]
        self._me = self._account + "<" + self._user + ">"

        server = smtplib.SMTP() 
        server.connect(host) 
        server.login(self._account,passwd)
        self._server = server     

    # 发送文件或html邮件   
    def sendTxtMail(self,to_list,sub,content,subtype='html'):   
        # 如果发送的是文本邮件，则_subtype设置为plain
        # 如果发送的是html邮件，则_subtype设置为html
        msg = MIMEText(content,_subtype=subtype,_charset='utf-8') 
        msg['Subject'] = sub 
        msg['From'] = self._me 
        msg['To'] = ";".join(to_list) 
        try:
            self._server.sendmail(self._me,msg.as_string())  
            return True 
        except Exception,e: 
            print str(e) 
            return False

    # 发送带附件的文件或html邮件      
    def sendAttachMail(self,subtype='html'):
        # 创建一个带附件的实例
        msg = MIMEMultipart() 
        # 增加附件1
        att1 = MIMEText(open(r'D:\javawork\PyTest\src\main.py','rb').read(),'base64','utf-8')
        att1["Content-Type"] = 'application/octet-stream'
        # 这里的filename可以任意写，写什么名字，邮件中显示什么名字
        att1["Content-Disposition"] = 'attachment; filename="main.py"'
        msg.attach(att1)

        # 增加附件2
        att2 = MIMEText(open(r'D:\javawork\PyTest\src\main.py','utf-8')
        att2["Content-Type"] = 'application/octet-stream'
        att2["Content-Disposition"] = 'attachment; filename="main.txt"'
        msg.attach(att2)

        # 增加邮件内容
        msg.attach(MIMEText(content,_charset='utf-8'))

        msg['Subject'] = sub 
        msg['From'] = self._me
        msg['To'] = ";".join(to_list)

        try:
            self._server.sendmail(self._me,e: 
            print str(e) 
            return False
     # 发送带附件的文件或html邮件      
    def sendImageMail(self,subtype='html'):
        # 创建一个带附件的实例
        msg = MIMEMultipart()

        # 增加邮件内容
        msg.attach(MIMEText(content,_charset='utf-8'))

        # 增加图片附件
        image = MIMEImage(open(r'D:\javawork\PyTest\src\test.jpg','rb').read())
        #附件列表中显示的文件名
        image.add_header('Content-Disposition','attachment;filename=p.jpg')    
        msg.attach(image) 

        msg['Subject'] = sub 
        msg['From'] = self._me
        msg['To'] = ";".join(to_list)

        try:
            self._server.sendmail(self._me,e: 
            print str(e) 
            return False

    # 析构函数：释放资源 
    def __del__(self):
        self._server.quit()
        self._server.close()

mailto_list = ['xxx@163.com']
mail = SendEmail('smtp.163.com','xxx@163.com','xxxxxx')
if mail.sendTxtMail(mailto_list,"测试邮件","hello world！<br><br><h1>你好，发送文本文件测试<h1>"): 
    print "发送成功" 
else: 
    print "发送失败"

if mail.sendAttachMail(mailto_list,"测试邮件-带两个附件","hello world！<br><br><h1>你好，发送文本文件测试<h1>"): 
    print "发送成功" 
else: 
    print "发送失败"

if mail.sendImageMail(mailto_list,"测试邮件-带一个图片的附件","hello world！<br><br><h1>你好，发送文本文件测试<h1>"): 
    print "发送成功" 
else: 
    print "发送失败"

总结

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