I can also report that users are getting paypal messages without any problems on my MiaB setup (using v56)
I assume after the upgrade you rebooted the box?
Thanks for checking in and comparing with your box. correct, our MiaB box was rebooted after upgrade.
Hi, something that might be worth looking into. You mentioned that you disabled IPv6 in postfix conf. There are many things, in addition to postfix, that might still be using IPv6 and perhaps this causes the problem.
MIAB will be setup to ignore IPv6 if it isn’t available at install/upgrade time. If IPv6 becomes available later, this won’t interfere with IPv4 operations.
To disable IPv6 before the initial install, just run:
sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1
If you’re running a reinstall/upgrade, you might also need to remove the IPv6 lines from /etc/mailinabox.conf to prevent it from reusing any prior IPv6 addressing info.
Let me know if you want details about serving rDNS entries. MIAB can do it easily, with a little config, but you’ll also need to inform your ISP that rDNS entries for your domain(s) are “delegated” to your server.