It is simplest email backend for Django which supports async email delivery in parallel threads. Keep it simple! It has various analogs, you can google for it yourself.
Requirements
Django async email backend requires futures library. So you need to install it with pip install futures.
Django configuration settings
This is simple backend so you need to configure django to use our backend and you can alter pool size with EMAIL_BACKEND_POOL_SIZE.
EMAIL_BACKEND = 'utils.email.EmailBackend'
EMAIL_BACKEND_POOL_SIZE = 15 # default value