On Wed, Mar 03, 2004 at 11:36:09PM +0530, Aditya, ALD [Aditya Lalit Deshmukh] wrote:
> how about the smtp server simply rejecting mail from spoofed hosts > ? as all the viruses generate spoofed hosts and it is very easy for > any smtp server to do a dns lookup on the sending server, if the > hostname / ip address do not match reject the message. I guess you are talking about comparing HELO/EHLO domain with reverse/forward DNS record for the IP of the host. (?) Yes, this would definitely stop almost all SPAM/viruses instantly when "turned on". It just have two little problems - it would also definitely stop almost all email messages - and - there would be also no problem for SPAM/viruses to use real domain in EHLO verb tommorow. Martin Mačok _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
