> > > 2) Does dovecot.service required to use dovecot lmtp, or it may be > > > stoppped (i not often check my mails via client, but have many incoming > > > mails some time) > > > > I don't understand. If you want LMTP enabled, you also need to list its > > socket to dovecot.socket. LMTP is executed in a similar way to > > IMAP/POP3. (If you want LMTP via UNIX socket, I don't really know the > > answer to that. Does systemd support listening on UNIX sockets? Maybe > > it requires patching Dovecot more.) > > I'm not fully understand how can i do that and not lost my changes to > dovecot.socket when the packages updates and file has been rewritten...
packages should install systemd socket/service files in /lib/systemd/.... if you want to change any file, you should copy it to /etc/systemd/... and modify it there. systemd prefers files in /etc/systemd over those in /lib/systemd
