I know I can disable virus scanning completely from the control panel and I have appropriately disabled scanning on my domain and the email address where it needs to completely stay out of the way. I work for a small town newspaper. We have a mailing list of about 5000 recipients. When I send out weekly notice of updated content, my server load goes over the top(from < 1 to sometimes > 20) with what appears to be clamav scanning everything going out. This weekly mailout has become an almost guaranteed way for me to crash my otherwise nice 8 GB RAM/4 CPUs Ubuntu 12.04 VPS. Where would I begin to troubleshoot this? I think virus scanning is important for inbound email so I really like to resolve the matter with that.