I found that often when SPAMmers send e-mails they send several of them in a short time from different fake names from the same domain. For now I use the "Block Sender" feature but that only blocks one sender from that domain and does not block the rest. It would be handy if, like manually adding those to the filters, we could also more easily block their domain. Maybe with a confirmation box showing us the domain that this is expected to be applied to as a safeguard.