code: def send_messages(self, email_messages):
          
          from .mail import create
          from .utils import create_attachments
  
          if not email_messages:
              return
  
          for email_message in email_messages:
              subject = email_message.subject
              from_email = email_message.from_email
              message = email_message.body
              headers = email_message.extra_headers
  
              # Check whether email has 'text/html' alternative
              alternatives = getattr(email_message, 'alternatives', ())
              for alternative in alternatives:
                  if alternative[1].startswith('text/html'):
                      html_message = alternative[0]
                      break
              else:
                  html_message = ''
  
              attachment_files = {}
              for attachment in email_message.attachments:
                  if isinstance(attachment, MIMEBase):
                      attachment_files[attachment.get_filename()] = {
                          'file': ContentFile(attachment.get_payload()),
                          'mimetype': attachment.get_content_type(),
                          'headers': OrderedDict(attachment.items()),
                      }
                  else:
                      attachment_files[attachment[0]] = ContentFile(attachment[1])
  
              email = create(sender=from_email,
                             recipients=email_message.to, cc=email_message.cc,
                             bcc=email_message.bcc, subject=subject,
                             message=message, html_message=html_message,
                             headers=headers)
  
              if attachment_files:
                  attachments = create_attachments(attachment_files)
  
                  email.attachments.add(*attachments)
  
              if get_default_priority() == 'now':
                  email.dispatch()
docs: Queue one or more EmailMessage objects and returns the number of
          email messages sent.