If amavisd process in your server is taking 100% CPU then try the following
Add this configuration in file /etc/mail/spamassassin/local.cf
use_bayes 0 bayes_auto_learn 0
then restart amavisd
systemctl restart amavisd
If amavisd process in your server is taking 100% CPU then try the following
Add this configuration in file /etc/mail/spamassassin/local.cf
use_bayes 0 bayes_auto_learn 0
then restart amavisd
systemctl restart amavisd