Oh there is a 'unsubscribe'. It's "delete *@nextdoor.com on arrival". Do this for all domains they use. Also, report each and every one as spam. Use search to

Oh there is a 'unsubscribe'. It's "delete *@nextdoor.com on arrival". Do this for all domains they use. Also, report each and every one as spam. Use search to find all, and report all. And also, delete account. Send shitty email to legal threatening unsubscribe and removal of all data. Come from EU VPN and demand GDPR followed.