spam acl condition: error reading from spamd socket: Connection timed out
If the spamd is timed out, it should not get the spam score and email should save in the user inbox as usual instead filtered out.
To avoid this problem, increase the spamd children maximum process. Go to WHM -> cPanel -> Manage Plugins and install spamdconf. Close your WHM, and reopen it again. You will find the menu 'Setup Spamd Startup Configuration' at the bottom of the left menu. Increase the Maximum Children value and restart MTA on the server.