volzeras.online has been advertised in spam E-mail similar to that from offeresnegg.icu and offereothers.club. While there is no evidence that these sites actually sent the spam, the advertised links are hosted there. The spam contains an unsubscribe link but I am not going to click on a link in a spam. I see nothing to be lost by blacklisting all E-mail that contains any of these domains.