[SOLVED] warning: connect to Milter service inet:127.0.0.1:8891: Connection refused

1. Change in /etc/opendkim.conf

Socket inet:8891@127.0.0.1

2. Change in /etc/default/opendkim

SOCKET="inet:8891@127.0.0.1"

3. Change in /lib/systemd/system/opendkim.service

ExecStart=/usr/sbin/opendkim -P /var/run/opendkim/opendkim.pid -p inet:8891@127.0.0.1