<html><head></head><body>I'll dig into this next week. Not sure at which point spamhaus opens a ticket about this.<br><br>Aki<br><br><div class="gmail_quote">On 20 November 2021 20.15.17 UTC, Arjen de Korte <build+dovecot@de-korte.org> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre dir="auto" class="k9mail">It looks like the mailinglist server IPv6 address has been blacklisted:<br><br><a href="https://check.spamhaus.org/listed/?searchterm=2a04:3545:1000:720:acc1:5bff:fe5e:459">https://check.spamhaus.org/listed/?searchterm=2a04:3545:1000:720:acc1:5bff:fe5e:459</a><br><br>The 'Show details' shows the entire 2a04:3545:1000:720::/64 network is <br>blacklisted. Whois tells this is a network used by UpCloud Cloud <br>Servers. So either the mailinglistserver or a server it shares its <br>network with is compromised. If UpCloud gives its users their own /64, <br>it would probably be the former. Otherwise it might make sense to ask <br>them for one, as sharing IPv6 networks between customers is a no-no in <br>the IPv6 world.<br><br></pre></blockquote></div></body></html>