I have a gmail account and a RoundCube thing at my own domain (managed by the domain name provider). Gmail's spam filtering is very generous to DKIM-signed mai

I have a gmail account and a RoundCube thing at my own domain (managed by the domain name provider). Gmail's spam filtering is very generous to DKIM-signed mail - it has a tendency to let it trough even if I've flagged exactly that sender before (as I did with walmart). The one on my own domain has received too little spam to tell how good the filter is.