On CentOS7, using systemd or otherwise, is there a better way to restart postfix than:
sudo systemctl restart postfix
Won't the above break any active mail connections that are happening? I'm looking for something like Apache's graceful restart and wondering if it's possible, or if it's necessary.
Best Answer
Very few changes to postfix configuration require a full restart. It's almost always sufficient to have postfix reload its configuration while still running.
Even the man page mentions this.
And even if mail connections do break, when you have to restart the mail server, the sending mail server will just try again later.