FWIW, there was a separate document that was specifically about DKIM results with the intended recipient to be the DKIM signer. This is unrelated to the FBL, but might still be interesting. I suspect it would need a bit of work for DKIM2.
Happy to talk more about DKIM-FBL if folks are interested. I saw it came up during an IETF session last week as well, though I can't seem to find that reference now. -- Alex Brotman Sr. Engineer, Anti-Abuse & Messaging Policy Comcast > -----Original Message----- > From: John Levine <[email protected]> > Sent: Friday, July 24, 2026 4:24 AM > To: [email protected] > Cc: [email protected] > Subject: [Ietf-dkim] Re: Discussion around ESP feedback / abuse handling > > It appears that Tom Ellengold <[email protected]> said: > >-=-=-=-=-=- > >-=-=-=-=-=- > > > >Hi All, > > > >Bron suggested that I reach out here as there have been questions > >regarding how DKIM2 will affect FBL's and abuse handling. > > > >Are there any expected changes or expectations around abuse handling as > part of this? > > At this point the answer is definitely maybe. > > We expect DKIM2 to supplant and eventually replace DKIM1, so that will have > some effect on DMARC. > One issue is what aligned means when there's a chain of signatures with > different d=. My inclination is to say that if any of the domains in a valid > chain > match the From header domain, that's aligned, but we have to work that out. > > Another is DMARC reporting. I suppose we could just say to report DKIM2 > success the same as DKIM1 but I suspect some more flags will be useful. > > For FBLs, the current draft has a f=feedback flag to ask for feedback, and > f=feedhere flag that privacy preserving forwarders can use to ask that reports > be sent to them and not farther up the chain. At this point there's no more > details about what the feedback is or how you decide if and where to send it, > but see > draft-brotman-dkim-fbl-06 for a plausible approach. > > R's, > John > > _______________________________________________ > Ietf-dkim mailing list -- [email protected] To unsubscribe send an email to > ietf- > [email protected] _______________________________________________ Ietf-dkim mailing list -- [email protected] To unsubscribe send an email to [email protected]
