The X-* construct has been deprecated. It was a worthy experiment, and had an entirely reasonable value proposition, but it has a significant downside: If the header field becomes popular and standardized, the field name has to be changed. That's a /very/ serious barrier to adoption of the 'standard' form.
So the rule now is: choose a name that works as a long-term standard, even when it's initial used privately. I realize there is already some installed base for x-original-from, but let's make the change now rather than later. Along an entirely different line of analysis, note that Original-From is merely adding complexity to the 'who was the author of this message' assessment, very possibly creating yet-another security hole. d/ On 10/3/2014 9:28 AM, Tim Draegen wrote: > Although a bit forward looking, I've created this page: > > http://trac.tools.ietf.org/wg/dmarc/trac/wiki/XOriginalFrom > > ..for people to add their smarts of how X-Original-From is being used today. > I haven't fleshed it out with content, please feel free to do so! > > This page is being linked from the next milestone's wiki page, fwiw: > > http://trac.tools.ietf.org/wg/dmarc/trac/wiki/MilestoneTwoWiki > > 1/2 of WG Chair, > =- Tim > > _______________________________________________ > dmarc mailing list > dmarc@ietf.org > https://www.ietf.org/mailman/listinfo/dmarc > > -- Dave Crocker Brandenburg InternetWorking bbiw.net _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
