@ryanc @Sempf I mean, I get that, but in the meantime the blowback still hits the innocent non-sender. As a troubleshooter, I 100% hated silent discard, but as a spam fighter from back in the day, never doing that produced a whole bunch of busy work and harm that was impossible to work around otherwise. (Rejecting early in the connection was of course ideal!). But I've been out of this game for more than a decade ...