docs: def generic_send_mail(sender, dests, subject, message, key, origin='', html_message=False):
      """Generic mail sending function"""
  
      # If no EBUIO Mail settings have been set, then no e-mail shall be sent
      if settings.EBUIO_MAIL_SECRET_KEY and settings.EBUIO_MAIL_SECRET_HASH:
          headers = {}
  
          if key:
              from Crypto.Cipher import AES
  
              hash_key = hashlib.sha512(key + settings.EBUIO_MAIL_SECRET_HASH).hexdigest()[30:42]
  
              encrypter = AES.new(((settings.EBUIO_MAIL_SECRET_KEY) * 32)[:32], AES.MODE_CFB, '87447JEUPEBU4hR!')
              encrypted_key = encrypter.encrypt(hash_key + ':' + key)
  
              base64_key = base64.urlsafe_b64encode(encrypted_key)
  
              headers = {'Reply-To': settings.MAIL_SENDER.replace('@', '+' + base64_key + '@')}
  
          msg = EmailMessage(subject, message, sender, dests, headers=headers)
          if html_message:
              msg.content_subtype = "html"  # Main content is now text/html
          msg.send(fail_silently=False)
  
          try:
              from main.models import MailSend
  
              MailSend(dest=','.join(dests), subject=subject, sender=sender, message=message, origin=origin).save()
  
          except ImportError:
              pass
      else:
          logger.debug(
              "E-Mail notification not sent, since no EBUIO_MAIL_SECRET_KEY and EBUIO_MAIL_SECRET_HASH set in settingsLocal.py.")