Has anyone encountered this error showing in the logs a few times every second.
2026-07-23T05:10:50.995126+00:00 mail postfix/postqueue[850008]: fatal: inet_addr_local[getifaddrs]: getifaddrs: Address family not supported by protocol
2026-07-23T05:10:51.003555+00:00 mail postfix/postqueue[850011]: fatal: inet_addr_local[getifaddrs]: getifaddrs: Address family not supported by protocol
This is a brand new install on Ubuntu Server 24. It does not appear to be causing any problems yet, but I would prefer no fatal errors in the logs by default.
Hi,
I noticed this too. From my initial understanding, these logs come from the stats service (carbonio-stats), not from mail delivery. On 26.6.0, carbonio-stats blocks something postqueue needs to read the network interfaces, so it keeps failing and retrying.
Could you please try this:
- Create /etc/systemd/system/carbonio-stats.service.d/10-netlink.conf with:
[Service] RestrictAddressFamilies= RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX AF_NETLINK SupplementaryGroups=postdrop
- systemctl daemon-reload
- systemctl restart carbonio-stats.service
Meanwhile, I will try to dig deeper and discuss this issue with the devs.
Thanks!