I'll dig into this next week. Not sure at which point spamhaus opens a ticket about this.
Aki On 20 November 2021 20.15.17 UTC, Arjen de Korte <[email protected]> wrote: >It looks like the mailinglist server IPv6 address has been blacklisted: > >https://check.spamhaus.org/listed/?searchterm=2a04:3545:1000:720:acc1:5bff:fe5e:459 > >The 'Show details' shows the entire 2a04:3545:1000:720::/64 network is >blacklisted. Whois tells this is a network used by UpCloud Cloud >Servers. So either the mailinglistserver or a server it shares its >network with is compromised. If UpCloud gives its users their own /64, >it would probably be the former. Otherwise it might make sense to ask >them for one, as sharing IPv6 networks between customers is a no-no in >the IPv6 world. >
