怎样从signal发送电子邮件

send_email_signal = django.dispatch.Signal(
    providing_args=['emailto', 'title', 'content'])
def send_email(emailto, title, content):
    from djangoProject4.blog_signals import send_email_signal
    send_email_signal.send(
        send_email.__class__,
        emailto=emailto,
        title=title,
        content=content)
            send_email(
                emailto=[
                    user.email,
                ],
                title='验证您的电子邮箱',
                content=content)

请问为什么用户保存了,但是为什么邮件没有发出去呢?

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