# - After upgrade from jessie to strech systemd seems to "ignore" the Postfix startup. # - # - Also "systemctl start postfix" does not work. # - # - I found out that I simply have to reload systemd with # - systemctl daemon-reload # - # - But after reboot, again no psotfix daemon is running # - # - Finally the following simple command fixed this problem # - systemctl enable postfix@- # - # - After rebooting, on some systems postfix starts up fine.