Simple SendGrid email backend for Django that uses authentication tokens

sendgrid_email_backend.py

from django.conf import settings
from django.core.mail.backends.base import BaseEmailBackend
from django.core.mail.message import sanitize_address
import sendgrid


class SendgridBackend(BaseEmailBackend):
    
    def __init__(self, user=None, token=None, **kwargs):
        super(SendgridBackend, self).__init__()
        self.user = user or getattr(settings, "SENDGRID_USER")
        self.token = token or getattr(settings, "SENDGRID_TOKEN")
    
    
    def send_messages(self, email_messages):
        """
        Sends one or more EmailMessage objects and returns the number of email
        messages sent.
        """
        num_sent = 0
        
        if not email_messages:
            return
        
        for message in email_messages:
            sent = self._send(message)
            if sent:
                num_sent += 1
        
        return num_sent
    
    
    def _send(self, email_message):
        if not email_message.recipients():
            return False
        
        try:
            sgrid = sendgrid.SendGridClient(self.user, self.token)
            message = sendgrid.Mail()
            
            message.set_from(sanitize_address(email_message.from_email, email_message.encoding))
            
            recipients = [sanitize_address(addr, email_message.encoding) for addr in email_message.recipients()]
            for recipient in recipients:
                message.add_to(recipient)
            
            message.set_subject(email_message.subject)
            message.set_from(email_message.from_email)
            message.set_text(email_message.body)
            
            status, msg = sgrid.send(message)
        
        except:
            return False
        
        return True