Colleagues, Can someone please point me to a mailing list server or other indirect mail flow that I might somehow engage with so that I can experience the pain of not having a message reach its destination when sent with a policy of p=reject?
I post to various IETF mailing lists from my work address, and my employer, like Mr. Brotman's, publishes a DMARC record with p=reject. Thanks to the work of the folks who manage the IETF mailing list software, my participation in these discussions is not hindered in any way; I can post to lists, people can reply directly to me if they choose, and I can reply to the list and/or to the author of any post without any extra work on my part. This leaves me in a position where I do not appreciate how a DMARC policy of p=reject can harm interoperability, or perhaps better stated, I do not appreciate that it does harm interoperability. I understand that it can, because SPF can fail when mail transits intermediaries and DKIM can fail if the intermediary alters the content of the message. That said, I cannot recall seeing a bounce attributable to a DMARC failure in the three years that I've worked here (nor for the year or two prior when my previous employer deployed p=reject) and so I want to be able to send a message that would result in such a bounce. Can anyone help me? Thanks. -- *Todd Herr * | Technical Director, Standards and Ecosystem *e:* todd.h...@valimail.com *m:* 703.220.4153 This email and all data transmitted with it contains confidential and/or proprietary information intended solely for the use of individual(s) authorized to receive it. If you are not an intended and authorized recipient you are hereby notified of any use, disclosure, copying or distribution of the information included in this transmission is prohibited and may be unlawful. Please immediately notify the sender by replying to this email and then delete it from your system.
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