> On 5 Jul 2024, at 15:25, Andrea Pappacoda <andrea@xxxxxxxxxxxx> wrote: > > Ideally, I'd just get fd 3 and use it to listen for incoming requests, > and get fd 4 and use it to talk TLS + SMTP over TCP to the remote (or > local) SMTP server. If systemd opens the socket that means that you cannot do retries or report errors. This seems a significant problem for your service usability. Barry