python 发邮件，简单版本-526互联

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


class Template(object):
    html = """
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>{Title}</title>
</head>
<body>
    <div style="color: red; font-size: 16px;">{Content}</div>
    <div>bye bye</div>
</body>
</html>
    """

    def __init__(self, **kwargs):
        self.kwargs = kwargs

    def simple_render(self):
        return self.html.format(**self.kwargs)


class EmailSender(object):

    def __init__(self, from_address, password, smtp_host, smtp_port, ssl=False, template:Template=None):

        self.address = from_address
        self.password = password
        self.smtp_host = smtp_host
        self.smtp_port = smtp_port
        self.ssl = ssl
        self.connected = False
        self.template = template
        self.init_client()

    def create_attachment(self, filename=None, filepath=None, stream=None, charset='utf-8'):
        """
        创建附件
        :param filename:
        :param filepath:
        :param stream:
        :param charset:
        :return:
        """
        assert any((filepath, stream)), "attachment must provide filepath or file"
        assert filename, "filename can not be None"
        if filepath:
            f = open(filepath, 'rb')
            stream = f.read()
            f.close()
        attachment = MIMEText(stream, 'base64', charset)
        attachment["Content-Type"] = "application/octet-stream"
        attachment["Content-Disposition"] = f"attachment; filename={filename}"
        return attachment

    def init_client(self):
        """
        初始化客户端
        :return:
        """
        if self.ssl:
            self.client = smtplib.SMTP_SSL()
        else:
            self.client = smtplib.SMTP()
        try:
            self.client.connect(self.smtp_host, self.smtp_port)
            self.client.login(self.address, self.password)
            self.connected = True
        except smtplib.SMTPAuthenticationError:
            print("username or password wrong.")
        except smtplib.SMTPHeloError:
            print("server didnt reply.")
        except smtplib.SMTPException as e:
            print(e)

    def create_text_or_html(self, text, is_html=True, charset=None):
        """
        创建email信件内容
        :param text:
        :param is_html:
        :param charset:
        :return:
        """
        sub_type = "html" if is_html else "plain"
        message = MIMEText(text, sub_type, charset)
        return message

    def send_with_attachment(self, Subject, attachment, sender, receiver, to_address):
        """
        attachment: {"filename": filename,
                     "stream": file stream,
                     "filepath": file path}
                     must provide at least one of filepath & stream
        """
        message = MIMEMultipart()
        message["From"] = sender
        message["To"] = receiver
        message["Subject"] = Subject
        message.attach(self.create_text_or_html(self.template.simple_render()))
        message.attach(self.create_attachment(**attachment))
        self.client.sendmail(self.address, to_address, message.as_string())


if __name__ == '__main__':
    my_address = "address@126.com"
    password = "PASSWORD"
    to_address = "WANTED@qq.com"
    email_smtp = "smtp.126.com"
    context = "一对测试的内容"

    template = Template(Content="测试内容，传递一个附件", Title="测试")
    sender = EmailSender(my_address, password, email_smtp, 25, template=template)
    sender.send_with_attachment('邮件测试',
                                {"filename": "example.xls", "filepath": r"C:\Users\Haiton\Desktop\name_list.xls"},
                                "126.com", "qq.com", to_address)