I recently configured an additional IPv6 address on my Linode instance. I mostly followed these instructions aside from using netplan instead of systemd.
Anyway, I set the
PUBLIC_IPV6 value in
/etc/mailinabox.conf, re-ran the configuration and everything seemed fine. Then I got a bounce from Gmail noting that the PTR didn’t match. While I had the RDNS entry in Linode, outgoing messages were being sent on the SLAAC address.
I can manually change
/etc/postfix/main.cf and run
systemctl reload postfix, but that won’t survive a reconfigure/upgrade.
I found these previous threads with similar issues:
Specifically, the second one mentions editing
/etc/mailinabox.conf to change both the public and private entries.
I tried that, but every time I reconfigure with
curl …, the configuration file is overwritten and the private address is set to the SLAAC.
Is there something I’m doing wrong or some other configuration that is overriding the
PRIVATE_IPV6 setting in
Thanks for your help.