Also for me it is not such a risk since the viruses are not targetted to the OSes I use for this email list. However that is not to say that it is worth receiving such irrelevant emails. Subject to correction, I do not ever remember any attachments on this list except for viruses. So if people are never going to attach files then it should be simple for the list server administrators to just set an option to return all emails to their senders if they have attachments. Exceptions may be made for HTML (since many people send a HTML version of their emails ... and for its superior formating abilities) and PDF files should people wish to send on PDF files open to the public.