spam

Today I have 5 spam messages, sent yesterday, addressed to users@lists.opensuse.org :( They are all sent by User-Agent: HyperKitty on https://lists.opensuse.org/ I've noticed previously that pretty much all the spam I receive from this list are sent in the same way. So if it's too much to ask that the filters for this source be made stricter, can I suggest that we simply ban people from submitting mail to the list in this way? Such traffic makes up less than 1% of the messages to the list, so we won't be losing much.