> VRFY is part of SMTP, but many disable this on their server, as it > allows enumeration of usernames on the system (useful for bruteforce > attacks.) Here, I would surmise that SPF is your only real option for > doing anything like this. > There's an on-going thread on inet-access about implementing SPF. Interesting to see the different opinions and analyses (right and wrong) about the system. Anyone who's thinking about publishing or querying for SPF records should check it out (http://inet-access.net/pipermail/list/) _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota Help beta test TCLUG's potential new home: http://plone.mn-linux.org Got pictures for TCLUG? Beta test http://plone.mn-linux.org/gallery tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list