python smtplib 多部分邮件正文在 iPhone 上不显示

Question

我正在尝试用Python中的smtplib发送一封带图片的邮件。这封邮件在我的电脑和iPhone的Gmail应用上显示正常，但在iPhone的标准邮件应用中，邮件内容却不见了。以下是我的代码：

    def send_html_email(self, subject, html, to_email,from_email, password, from_name, image=None):
        msg = MIMEMultipart('alternative')
        msg['From'] = from_name
        msg['To'] = to_email
        msg['Subject'] = subject

        html_message = MIMEText(html, "html")
        msg.attach(html_message)

        if image:
            msgImage = MIMEImage(image)
            msgImage.add_header('Content-ID', '<image1>')
            msg.attach(msgImage)

        session = smtplib.SMTP("smtp.gmail.com:587")
        session.starttls()
        session.login(from_email, password)
        session.sendmail(from_email, to_email, msg.as_string().encode('utf-8'))
        session.quit()

看起来当我不添加图片时，邮件的内容可以正常发送。有没有什么办法可以让带图片的邮件也能正常显示内容呢？

Answer 1

这似乎是可行的：

def send_html_email(self, subject, html, to_email, from_email, password, from_name, image=None):
    msgRoot = MIMEMultipart('related')
    msgRoot['From'] = from_name
    msgRoot['To'] = to_email
    msgRoot['Subject'] = subject
    msg = MIMEMultipart('alternative')
    msgRoot.attach(msg)
    html_message = MIMEText(html, "html")
    msg.attach(html_message)

    if image:
        msgImage = MIMEImage(image)
        msgImage.add_header('Content-ID', '<image1>')
        msgRoot.attach(msgImage)

    session = smtplib.SMTP("smtp.gmail.com:587")
    session.starttls()
    session.login(from_email, password)
    session.sendmail(from_email, to_email, msgRoot.as_string().encode('utf-8'))
    session.quit()