On Fri, 11 Jun 2004, David F. Skoll wrote: > You **MUST** configure your mail network to reject invalid recipients > with a 5xx code at the MX server. The good old days of having a gateway > machine that lacks knowledge of valid internal addresses are gone; such > an architecture is unsustainable in today's hostile environment.
Back in the day, you wouldn't return a 5xx code on invalid recipients since that would make it very easy for spammers to build a "good" and a "bad" email list. Thus making their operations much more efficient at the cost of bandwidth and CPU cycles on our mail server. Is this no longer a good thing to do? ray -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Ray DeJean http://www.r-a-y.org Systems Engineer Southeastern Louisiana University IBM Certified Specialist AIX Administration, AIX Support =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [EMAIL PROTECTED] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
