My hypothesis for this issue is that the service's port was not released by the time the upgrade attempted to restart the service.
Any chance this is reproducible with the spamassassin from focal? ** Changed in: spamassassin (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1413240 Title: package spamassassin 3.4.0-1ubuntu2 failed to install/upgrade: spamd: could not create IO::Socket::INET6 socket on [127.0.0.1]:783: Address already in use To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/spamassassin/+bug/1413240/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs