I am in a situation where clamscan is absolutely trashing a VPS I have Virtualmin installed on (processing eicar.com.txt takes around 50 sec and almost 100% CPU). I looked at ways of switching from clamscan to clamdDscan which is way, way faster and kinder on resources, but once I do that Virus filtering stops working, emails hit the Inbox undetected.
What I did was to go to "Spam and Virus Scanning" (under Email Settings), unchecked "Standalone scanner" and checked "Local server scanner". If I choose "Other program" and input /usr/bin/clamdscan it will also have no effect.
Am I missing something or have I just found a bug?