>> Both operations look potentially expensive, and port-scanning the >> sender means all our legitimate senders will soon see regular port >> scans.
>Yeah, the port-scanning looks troublesome, especially if you do it in real-time. In many cases (and both of the networks I run), that'll get you firewalled immediately. Port scans are not friendly actions... Proper implementation of SPF or a similar system across all mail domains would cut spamming by 99% overnight, and would remove almost all of the risk from phishing mails. Don't re-invent the wheel - just get the design from last year to be accepted by more people. Paul. _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
