and on top of that, the last thing you want to do for many actual spam lists is to click their per-address unique tracking tag which tells them that your addres

and on top of that, the last thing you want to do for many actual spam lists is to click their per-address unique tracking tag which tells them that your address is valid. If you've already started communicating with them I guess it's probably reasonable to consider it 'blown' anyway, but I'm always extremely dubious of opt-out/unsub links for that reason.