I was a very happy dspam user for about three days -- SpamAssassin's accuracy on my setup is terrible, and dspam performed pretty well (and increasingly so with training).

Then, dspam started segfaulting, and none of my e-mail was delivered. I looked into what was going on, and it appeared that the dspam hash database had somehow become corrupted; and since dspam is completely unmaintained these days, it was unlikely that whatever bug I tripped upon would ever be fixed.

Sigh. I also would like to hear user reports about rspamd! I am getting sick of the false negative rate that I'm getting from SpamAssassin.