models.py

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.db import models
from django.utils.encoding import python_2_unicode_compatible


@python_2_unicode_compatible
class Email(models.Model):
    create_date = models.DateTimeField(auto_now_add=True)
    subject = models.TextField(blank=True)
    body = models.TextField(blank=True)
    content_subtype = models.CharField(max_length=254)
    from_email = models.CharField(max_length=254, blank=True)
    to = models.TextField(blank=True)
    cc = models.TextField(blank=True)
    bcc = models.TextField(blank=True)
    headers = models.TextField(blank=True)

    def __str__(self):
        return '{} - {}, {}'.format(self.subject, self.to, self.create_date)


@python_2_unicode_compatible
class EmailAlternative(models.Model):
    email = models.ForeignKey(Email, on_delete=models.CASCADE, related_name='alternatives')
    content = models.TextField(blank=True)
    mimetype = models.CharField(max_length=254, blank=True)

    def __str__(self):
        return '{}: alternative {}'.format(self.email, self.mimetype)


@python_2_unicode_compatible
class EmailAttachment(models.Model):
    email = models.ForeignKey(Email, on_delete=models.CASCADE, related_name='attachments')
    filename = models.CharField(max_length=1000, blank=True)
    mimetype = models.CharField(max_length=254, blank=True)
    file = models.FileField(upload_to='db_email_backend')

    def __str__(self):
        return '{}: attachment {}'.format(self.email, self.filename)