Am 10.04.2014 12:03, schrieb Miles Fidelman: > Hi Folks, > > I'm sure at least some of you have been bitten by the debacle associated > with Yahoo turning on strict DMARC enforcement (particularly any of you > who, like me, manage a list server).
yes with listserver mailman, had to upgrade to version 2.1.16 and change configs perhaps see https://sys4.de/de/blog/2013/08/11/dkim-konforme-mailinglisten/ https://sys4.de/de/blog/2013/08/11/mailman-dmarc-konform-betreiben/ sorry german ( but images are english ) > > Which leads to a question: Any suggestions for how to validate a DKIM > signature, and apply an Original-Authentication-Results header, at the > MTA level (specifically Postfix)? (And/or, any operational experience > that this is a viable way to address the problem.) > > Thanks very much, > > Miles Fidelman > its a general "mail forward" problem, spf etc "breaks" classical forwarding as well as strict dmarc at servers which honor this, i dont think you should/could fix this with "plain" postfix only one option maybe send orig mail as attach... or use "alternate" style forwarding via imap pop3toimap from http://code.google.com/p/imaputils/downloads/list does this Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein
