old_contents: from django.core.mail import get_connection
  from django.core.mail.backends.base import BaseEmailBackend
  from django.core.mail.backends.smtp import EmailBackend
  
  from .conf import settings
  from .models import Email
  
  
  class EmailBackend(BaseEmailBackend):
  
      """Wrapper email backend that records all emails in a database model"""
  
      def __init__(self, **kwargs):
          super(EmailBackend, self).__init__(**kwargs)
          self.connection = get_connection(settings.EMAIL_LOG_BACKEND, **kwargs)
  
      def send_messages(self, email_messages):
          num_sent = 0
          for message in email_messages:
              recipients = '; '.join(message.to)
              email = Email.objects.create(
                      from_email=message.from_email,
                      recipients=recipients,
                      subject=message.subject,
                      body=message.body,
              )
              message.connection = self.connection
              num_sent += message.send()
              if num_sent > 0:
                  email.ok = True
                  email.save()
          return num_sent
  
new_contents: from django.core.mail import get_connection
  from django.core.mail.backends.base import BaseEmailBackend
  
  from .conf import settings
  from .models import Email
  
  
  class EmailBackend(BaseEmailBackend):
  
      """Wrapper email backend that records all emails in a database model"""
  
      def __init__(self, **kwargs):
          super(EmailBackend, self).__init__(**kwargs)
          self.connection = get_connection(settings.EMAIL_LOG_BACKEND, **kwargs)
  
      def send_messages(self, email_messages):
          num_sent = 0
          for message in email_messages:
              recipients = '; '.join(message.to)
              email = Email.objects.create(
                      from_email=message.from_email,
                      recipients=recipients,
                      subject=message.subject,
                      body=message.body,
              )
              message.connection = self.connection
              num_sent += message.send()
              if num_sent > 0:
                  email.ok = True
                  email.save()
          return num_sent
  
subject: Remove unused import