On-access AV scanning

[Wojciech Puchar]

> I did some testing several years ago with ClamAV, Sophos and McAfee (scanning 
> incoming mail), and ClamAV was comparable to McAfee in detection rates - over 
> 98%.
>
i use clamav for mail virus checking and IMHO it is the only place where 
realtime virus checking make sense.

some windows users have NOD32 antivirus and i never got a case that NOD32 
detected email virus after clamav filter.

Of course this is all windows only problem, unix doesn't have viruses.