python3.7实现发送邮件功能

import smtplib
from email.mime.text import MIMEText
from email.mime.image import MIMEImage
from email.mime.application import MIMEApplication
from email.mime.multipart import MIMEMultipart


class SendEMail(object):
    """封装发送邮件类"""

    def __init__(self, host, port, msg_from, pwd):

        self.msg_from = msg_from
        self.password = pwd

        # 邮箱服务器地址和端口
        self.smtp_s = smtplib.SMTP_SSL(host=host, port=port)

        # 发送方邮箱账号和授权码
        self.smtp_s.login(user=msg_from, password=pwd)

    def send_text(self, to_user, content, subject, content_type='plain'):
        """
        发送文本邮件
        :param to_user: 对方邮箱
        :param content: 邮件正文
        :param subject: 邮件主题
        :param content_type: 内容格式：'plain' or 'html'
        :return:
        """
        msg = MIMEText(content, _subtype=content_type, _charset="utf8")

        msg["From"] = self.msg_from
        msg["To"] = to_user
        msg["subject"] = subject

        self.smtp_s.send_message(msg, from_addr=self.msg_from, to_addrs=to_user)

    def send_file(self, to_user, content, subject, reports_path, filename, content_type='plain'):
        """
        发送带文件的邮件
        :param to_user: 对方邮箱
        :param content: 邮件正文
        :param subject: 邮件主题
        :param reports_path: 文件路径
        :param filename: 邮件中显示的文件名称
        :param content_type: 内容格式
        """

        file_content = open(reports_path, "rb").read()

        msg = MIMEMultipart()

        text_msg = MIMEText(content, _subtype=content_type, _charset="utf8")
        msg.attach(text_msg)

        file_msg = MIMEApplication(file_content)
        file_msg.add_header('content-disposition', 'attachment', filename=filename)
        msg.attach(file_msg)

        msg["From"] = self.msg_from
        msg["To"] = to_user
        msg["subject"] = subject

        self.smtp_s.send_message(msg, from_addr=self.msg_from, to_addrs=to_user)

    def send_img(self, to_user, subject, content,  filename, content_type='html'):
        '''
        发送带图片的邮件
        :param to_user: 对方邮箱
        :param subject: 邮件主题
        :param content: 邮件正文
        :param filename: 图片路径
        :param content_type: 内容格式
        '''
        subject = subject
        msg = MIMEMultipart('related')
        # Html正文必须包含<img src="cid:imageid" alt="imageid" width="100%" height="100%>
        content = MIMEText(content, _subtype=content_type, _charset="utf8")
        msg.attach(content)
        msg['Subject'] = subject
        msg['From'] = self.msg_from
        msg['To'] = to_user

        with open(filename, "rb") as file:
            img_data = file.read()

        img = MIMEImage(img_data)
        img.add_header('Content-ID', 'imageid')
        msg.attach(img)

        self.smtp_s.sendmail(self.msg_from, to_user, msg.as_string())


if __name__ == '__main__':
    host = 'smtp.qq.com'
    port = '465'
    msg_from = '525734526@qq.com'
    pwd = 'mpvnxxxxxxxxx'
    e = SendEMail(host,port,msg_from,pwd)
    e.send_text('2211223@163.com','python发送邮件测试','python')

其中最关键的是需要获取发送方邮箱的授权码，获取步骤为，以qq邮箱示例：

1.登录发送方邮箱，点击设置-账户，将POP3/SMTP服务设置成开启

2.点击生成授权码，复制出来即可