Update ClamAV through TOR

/opt/zimbra/common/etc/freshclam.conf

HTTPProxyServer 192.168.97.8
HTTPProxyPort 8123

root crontab

[root@zmail etc]# crontab -l
20 7,17 * * * su - zimbra -c "freshclam && zmfreshclamctl restart" > /dev/null 2>&1