[email protected] said: > Much spam passing current postfix UCE filters and landing in the INBOX are > from IP addresses that do not resolve to a domain name. The headers include a > 'Received: from <some_domain_name> (unknown [nnn.ooo.ppp.qqq])'.
> Is the unknown IP address a reliable indicator of spam? A Web search did > not answer this question. One hit, to an Apple mail forum, suggested that it > can be the result of some (many?) Mac admins not correctly configuring their > DNS servers. In my personal opinion, yes. 90% of the spam I reject is based on no reverse-DNS being available. My assumption is that any legitimate server will have properly configured reverse-DNS configured. In my case I only care about the fact that that it resolves, not what it resolves to. And you should have a way to whitelist senders/addresses/etc., since there will always be the occasional clueless site that you probably care about. john- _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
