Ten years ago, I ran an email antivirus on a Linux box. Not for linux users (only root), and neither for the MacOSX users on the LAN, but for the people extern

Ten years ago, I ran an email antivirus on a Linux box. Not for linux users (only root), and neither for the MacOSX users on the LAN, but for the people external to the organization who were sending MS-Word documents full of malware, that were forwarded back to them. Internally the viruses were ineffective, but it affected external correspondants, so we filtered them. Nowadays, there are a few MacOSX and Linux malware, so it could be useful if you are a high visibility potential target, to have such filters.