Our SMTP and antispam service is now available over IPv6


As part of our rollout of services over IPv6, which has already been completed for NTP we’ve made our SMTP handling available over IPv6 too.

If you’re using our anti-spam solution you should be aware that it will now try to connect to your host over IPv6 if possible.

Connections will come from addresses in the ranges

] 2001:41c8:20:359::/64

So if you block mail or connections on a per IP basis, you should allow anything from those addresses.