Thanks. If I disable 'Virus Filter' under What Objects and I disable and turn off ClamAV, would that negatively affect the system?Can be used for both direction. Depends on your rule settings.
Yes. And if I disable and turn off the ClamAV service after doing so, would that negatively affect the system?You need to disable the rules where you use the virus scanning.
Well, for example, if the pmg smtp filter service is not running, mail would only get sent to localhost. So, if I have no rules that invoke virus scanning with ClamAV and I then disable the service, would it prevent any mail from getting through as is the case with some other crucial PMG-related services?You need to define what you mean with "negatively affect"?
I would not disable virus-scanning or the clamav service, but you can do it if you have a use case for this.