How should I handle conflicting Postfix and Exim systemd units?
Postfix and Exim need to run on the same host, with Exim using an alternate port, but their packaged systemd units conflict. Direct edits get replaced during package…
Exim
How can I override a systemd service conflict without losing changes during package updates?
I'm running both Postfix and Exim, with Exim configured to use an alternate port. Their systemd unit files declare a conflict, so they cannot run together. Editing the…