Am 10.04.2014 12:47, schrieb Robert Schetterer: > 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 >
forgot to add , some mailprovider use a forward "service" to solve the problem then sender is like forwar...@mailforward.com but there are problems with this too, like different antispam setting, so i sometimes get bounces from the forwarder *g 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
