For a few weeks I had some strange errors with my self-hosted webmail, Snappymail. After working for some time it complained that it couldn't connect to tcp://mydomain.tld:143. My email clients worked, though. The situation got worse a few days ago when I updated the server and rebooted it.

My webmail is hosted in a systemd-nspawn system container. I use such containers for a lot of different services.

For debugging purposes I tried some telnet and openssl s_client stuff today but I've been on the wrong track with that. ping'ing from the webmail container already failed. There was something more fundamental amiss.

#systemd #networkd #nspawn #nft #selfhosted

For a few weeks I had some strange errors with my self-hosted webmail, Snappymail. After working for some time it complained that it couldn't connect to tcp://mydomain.tld:143. My email clients worked, though. The situation got worse a few days ago when I updated the server and rebooted it.

My webmail is hosted in a systemd-nspawn system container. I use such containers for a lot of different services.

For debugging purposes I tried some telnet and openssl s_client stuff today but I've been on the wrong track with that. ping'ing from the webmail container already failed. There was something more fundamental amiss.

#systemd #networkd #nspawn #nft #selfhosted