On Fri, Oct 5, 2012 at 11:03 AM, <trinity-users-help@...> wrote: > Hi! This is the ezmlm program. I'm managing the > trinity-users@... mailing list. [snip] > --8701F456024E.1348439718/vali.starlink.edu > Content-Description: Delivery report > Content-Type: message/delivery-status > > Reporting-MTA: dns; vali.starlink.edu > X-Postfix-Queue-ID: 8701F456024E > X-Postfix-Sender: rfc822; trinity-users-return-3629-robxu9=gmail.com@... > Arrival-Date: Sun, 23 Sep 2012 17:35:17 -0500 (CDT) > > Final-Recipient: rfc822; robxu9@... > Original-Recipient: rfc822;robxu9@... > Action: failed > Status: 5.7.1 > Remote-MTA: dns; gmail-smtp-in.l.google.com > Diagnostic-Code: smtp; 550 5.7.1 Unauthenticated email is not accepted from > this domain. k2si7073925igo.55 > [snip] > Subject: Re: [trinity-users] Unsubscribe threat > > What is beginning to happen around the net -- with 'responsible' ISPs -- > is the enforcement of Forward-confirmed reverse DNS (FCrDNS) > > http://en.wikipedia.org/wiki/Forward-confirmed_reverse_DNS > -and- > > Sender Policy Framework (SPF) > > http://en.wikipedia.org/wiki/Sender_Policy_Framework > > In a nutshell, lists email distribution is affected because the emails > are re-sent by the list server as From: The_Originator@.... > Which is true -- it did originate "From:" me, or "From:" you. > But, it appears to be a forgery to incoming mailservers that do this > checking, because those emails CANNOT be "From:" that user from THAT MTA. > > For example, this email - From: Jonesy <trinity@...> cannot > be sent from the mail servers at vali.starlink.edu --- at least not > with FCrDNS checking. > > FCrDNS cuts down on A LOT of spam. My SysAdmin says 90% of incoming > email is pure crap spam -- with forged "From:"s out of cracked botnet > machines. FCrDNS cuts down on ALMOST ALL of that. > Think of the savings... > > But, I've had to remove my domain from that checking by my ISP because > I am on so many lists, email reflectors, what-ever-you-call-them. > Eventually lists will have to evolve to some different scheme. Huh? So you are intentionally having emails bounce? > > Too much information? > Jonesy > brb; head hurts ;P -- later daze. :: Robert Xu :: protocol.by/rxu