如何从django表单发送电子邮件信息？- Django 2

from django.core.mail import send_mail
from django.shortcuts import render

def send_email(request):
    if request.method == 'POST':
        subject = request.POST.get('subject')
        message = request.POST.get('message')
        from_email = request.POST.get('from_email')
        recipient_list = [request.POST.get('recipient_email')]

        send_mail(subject, message, from_email, recipient_list)

        return render(request, 'success.html')

    return render(request, 'email_form.html')

<form method="post" action="{% url 'send_email' %}">
    {% csrf_token %}
    <label for="subject">主题：</label>
    <input type="text" name="subject" id="subject">

    <label for="message">内容：</label>
    <textarea name="message" id="message"></textarea>

    <label for="from_email">发件人：</label>
    <input type="email" name="from_email" id="from_email">

    <label for="recipient_email">收件人：</label>
    <input type="email" name="recipient_email" id="recipient_email">

    <input type="submit" value="发送">
</form>