Hi @bingobingolotto and welcome to the forum.
We’ve discussed rspamd before and its something we keep under review in case it could help.
At the moment we’re reasonably happy with our spam scanning. There are always possible improvements and what works for one account may not work for another.
Just as a general update of this topic… we did implement some URIBL checks with some mixed results. There are some websites with dubious marketing tactics that some customers want to receive emails from and so we are continuing to monitor the situation so we can make further adjustments.