def METHOD_NAME(aws_meta):
    exists = TransientBounceEmail.objects.filter(
        email=aws_meta.email,
        timestamp=aws_meta.timestamp,
    ).exists()
    if not exists:
        TransientBounceEmail.objects.create(
            email=aws_meta.email,
            timestamp=aws_meta.timestamp,
            headers=aws_meta.headers,
        )