mail.py

import os
from email.mime.image import MIMEImage

from django.conf import settings
from django.template.loader import render_to_string
from django.core.mail import get_connection, EmailMultiAlternatives


def make_message(
    subject,
    body,
    to,
    images=None,
    attachments=None,
    connection=None,
    reply_to=None,
    from_email=settings.DEFAULT_FROM_EMAIL,
):
    msg = EmailMultiAlternatives(
        subject=subject,
        body=body,
        from_email=from_email,
        to=to,
        connection=connection,
        reply_to=reply_to,
    )

    if images:
        msg.mixed_subtype = "related"
        for image_path in images:
            content_id = os.path.basename(image_path)
            with open(image_path, "rb") as fp:
                image_data = fp.read()
                image = MIMEImage(image_data)
                image.add_header("Content-ID", "<{}>".format(content_id))
                msg.attach(image)

    if attachments:
        for filename, path in attachments:
            with open(path, "rb") as fp:
                content = fp.read()
                msg.attach(filename, content)

    msg.content_subtype = "html"
    return msg


def send_html_email(
    subject,
    template,
    to,
    context=None,
    reply_to=None,
    images=None,
    attachments=None,
    fail_silently=False,
):
    connection = get_connection(fail_silently=fail_silently)
    body = render_to_string(template, context)
    messages = []

    for recipient in to:
        msg = make_message(
            subject=subject,
            body=body,
            to=[recipient],
            connection=connection,
            images=images,
            attachments=attachments,
            reply_to=reply_to,
        )
        messages.append(msg)

    connection.send_messages(messages)