systemctl start clamd@amavisd amavisd spamassassin
from here
solved this problem :clamd: /var/spool/amavisd/tmp/amavis Can’t create temporary directory ERROR
more details from here
Linux Tutorial and something else…..
I don't know what's the matter with people: they don't learn by understanding, they learn by some other way — by rote or something. Their knowledge is so fragile! (Feynman)