Murray S. Kucherawy writes: > On Wed, Apr 29, 2015 at 5:04 AM, Stephen J. Turnbull <[email protected]> > wrote:
> > The *outgoing MTA* can do this check [for a modified and relayed > > message that fails From alignment]; it has the same information > > (the "From" field, the DKIM signature, and the DNS) that the > > mediator does. > > Outgoing from the Author, or outgoing from the Mediator? Outgoing from the Mediator. > Either way, it seems to me that this is something a fully compliant > participant might do, but that broken or hostile actors won't > bother doing. Ah, but mailing lists are *already* doing it, at least GNU Mailman implements an optional check for DMARC policy at the Author Domain, and munges if and only it's reject or quarantine. It's a popular feature. I'm just saying this could be implemented in the MTA as well, and it might go on the list of things you need to implement to get a Good Housekeeping Seal of Approval. _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
