Re: [dmarc-ietf] non-mailing list use case for differing header domains
On 03/08/2020 01:43, Douglas E. Foster wrote: > > I am not sure what "Internet Scale" means to you. Most of the major > recipients have bulk mailer registration systems. It does not > guarantee whitelisting, but it tends to produce that effect. I have > had occasion to register with most of them. So "does not scale" is > not obvious to me. This is not correct. In the past some large providers did offer such lists but these days most have moved away from that model for various reasons. You'll still find someone offering such as service, and pay-to-play is a thing too but none of this is a) widespread and b) based on any type of standard - it's all proprietary. The same goes for sender certification services such as ReturnPath. "Internet Scale" means being able to scale to internet level of usage and platform interoperability. TCP/IP and DNS are good examples. Data (e.g. lists of approved senders) maintained internally by individual organisations can't scale to that level for the same reason that organisations siloing their own DNS and routing information wouldn't work. Interoperability. Organisations publishing information (e.g. an SPF record) in their DNS zone works because it's based on an existing internet scale interoperable platform. While the "heavy lifting" of interpreting the SPF record might be undertaken by a variety of different software and system platforms, the mechanism is standardised based on the RFC. Again, interoperability. Ken. ___ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
Re: [dmarc-ietf] Apropos of the de-munging draft
On 2020-08-02 7:51 p.m., John Levine wrote: > In article you write: >>> Unwrapping a MIME attachment is a lot easier than the proposed DKIM >>> unmunging but I doubt either is going to show up in MUAs any time >>> soon. Perhaps you could do it in a mail gateway. >> >> >> Looking at the steps required to carry out the proposed unmunging, "a lot >> easier" doesn't seem to be an accurate measurement. > > In python it's about two lines since there are well debugged libraries to > handle MIME. Same in most other languages. If you use a library, most common operations can be done better than unusual ones, the actual complexity notwithstanding. The steps I outlined for tf=footer[*] can be done adding a few lines to Murray's library, in C. > I still would be amazed if any MUAs did this, also keeping in mind that the > changes that MLMs make ARE USEFUL. Agreed. IMHO, Murray's lib should do just a virtual unmunge, while canonicalizing. To actually replace From: with the original Author: can be done by the MDA, based on trusted A-Rs, after any dot-forward. Best Ale -- [*] https://mailarchive.ietf.org/arch/msg/dmarc/2ZN7DS5NktoyEPItZ5vzr-xd0Mc ___ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
