When I have installed OpenSUSE, I found that the postfix cannot start by itself ot automaticlly within systemd, I have studied it for a while, the solution can be found.
problem shown
An error can be found in status of services by systemd.
Bash
/usr/sbin/postconf: fatal: parameter inet_interfaces: no local interface found for ::1to solve it
edit /etc/postfix/main.cf file, and just change a value of it, like that:
Bash
# before
inet_protocils = all
# after
inet_protocols = ipv4why it causes this problem, because ipv6 disabled within network configuration.
Verifying
Bash
sudo systemctl start postfixit is active.