On Jul 14, 2005, at 2:40 PM, Darren Evans-Young wrote: > Is this possible? And if so, how to prevent it? > > Listserv receives a posting for a list containing a virus with a > forged > MAIL FROM: address. Listserv sends the rejected message back to the > forged > address because it isn't subscribed, thereby spreading the virus to > a new > email address. Darren, why don't you check out the F-Secure information on L-Soft's web site? Listserv and F-Secure have partnered to produce an F-Secure version that does exactly what you requested. See http:// www.lsoft.com/manuals/f-secure-faq.stm for details.