rspamd not fully configured

Rspamd is not fully configured as described in https://www.howtoforge.com/replacing-amavisd-with-rspamd-in-ispconfig/

This is missing: echo 'servers = "127.0.0.1";' > /etc/rspamd/local.d/redis.conf
And the optional steps:

echo "nrows = 2500;" > /etc/rspamd/local.d/history_redis.conf 
echo "compress = true;" >> /etc/rspamd/local.d/history_redis.conf
echo "subject_privacy = false;" >> /etc/rspamd/local.d/history_redis.conf

(maybe subject_privacy should be left out)