Lou, It could be an attack, but maybe not. Could just be people taking a net class and learning how to sub to a list, then unsub. I get that quite often. When I get a slew of new subs from the same domain, then a slew of unsubs for the same domain I don't even look at them anymore, I delete them just from the mail index. However, sounds like you are sub by owner and they ought to pick an open or open,confirm list for their practice. Douglas