Well, I have had a deliverability related encounter with ARC in the wild, and can report that ARC is actively being used by Zoho.
A client was using Zoho for their service desk and messages started going missing. The way these service desks work is that you forward say supp...@example.com to a unique Zoho supplied email address which goes to your service desk queue. On investigation, it was determined that the only messages going missing were those originating from domains with an enforcing DMARC policy and non-aligned/non-existent/broken DKIM. Correspondence with Zoho’s customer service revealed that they a) have implemented ARC, b) expect every mailbox provider to also have implemented ARC, and c) are making filtering decisions on that belief. They appear to be maintaining their own internal trust db. And yes, I know that this is ideally how we want ARC to work; Zoho are just eager and early to the party. They were not receptive to my opinion on the flaw with their strategy. In my client’s case, their ISP has no plans to implement ARC, so Zoho grudgingly disabled the filtering for their account. This incident made me wonder how much stealth ARC is out there, i.e. it’s not evident that it’s being used at all, or indeed for filtering decisions, until you poke the organisation. Ken. From: dmarc <dmarc-boun...@ietf.org> On Behalf Of Murray S. Kucherawy Sent: Wednesday 22 September 2021 21:30 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
_______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
