Piling onto Alex's response... we have some ARC functionality deployed and servicing customers. I'm currently looking into what useful data we can extract and share what we've learned from the implementation (which may lead to some useful topics to discuss in more depth).
In a related note... an early examination seems to underscore the need to more guidance about how to interpret ARC sets. As Alex pointed out... there are some messages with way more sets than can be used to make a reasonable determination about the provenance of the message. So, at the very least, I think we may need to develop some ancillary documents to support broader adoption. More as it develops, Trent From: dmarc <dmarc-boun...@ietf.org> on behalf of "Brotman, Alex" <Alex_Brotman=40comcast....@dmarc.ietf.org> Date: Thursday, September 23, 2021 at 3:08 PM To: "Murray S. Kucherawy" <superu...@gmail.com>, IETF DMARC WG <dmarc@ietf.org> Subject: Re: [dmarc-ietf] Experiments Murray, We’ve started (relatively recently, in volume) logging ARC data so we can try to make some informed decisions going forward. We’re not yet acting on anything as a result, nor writing into the message. We’re also not doing anything when mail is being forwarded. We’ll hopefully have more information/data available to share in the future (may not be the very near future given other projects going on). This isn’t a guarantee that we’ll fully adopt ARC in the future, but enough to say we’re logging/analyzing things. Random thing while looking at some data just now .. At least one message apparently came through with seven ARC sets. Let me know if there’s anything I can answer at this point. -- Alex Brotman Sr. Engineer, Anti-Abuse & Messaging Policy Comcast From: dmarc <dmarc-boun...@ietf.org> On Behalf Of Murray S. Kucherawy Sent: Wednesday, September 22, 2021 4:30 PM To: IETF DMARC WG <dmarc@ietf.org> Subject: [dmarc-ietf] Experiments Is anyone in a position to comment on the ARC and PSD experiments and how they're progressing? Deployment status? Data acquired thus far? -MSK
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