title: Django SendGrid not sending email when attaching a template to email
body: <p>When I send an email with no template I receive the email just fine. When I add an id for the template I don't get any errors but don't receive the email either. The template is set to active. I have my SENDGRID_API_KEY in my settings file. I know it must be something really stupid but cant seem to get it working. Any help would be greatly appreciated. Template id in the code below is masked so not what the actual code looks like.</p>
  
  <pre><code>from django.views.generic import TemplateView
  from django.shortcuts import render
  from django.conf import settings
  from django.core.mail import send_mail
  from django.core.mail import EmailMultiAlternatives
  
  
  def emailSendGrid(self):
      mail = EmailMultiAlternatives(
          subject="Your Subject from sendGrid",
          body="SendGrid sent This is a simple text email body.",
          from_email="m@test.com",
          to=["martin@test.com"],
          headers={"Reply-To": "m@test.com"}
      )
      # Add template
      mail.template_id = '##############################'
  
      # Replace substitutions in sendgrid template
      # mail.ad = {'testTag': 'Test email sent from sendgrid with new content'}
      mail.send()
  </code></pre>