Surprise! Or was it? I've been warning for a while now that DMARC doesn't play nice with mailing lists. But really nobody, not even me, thought that a big ISP like Yahoo was going to publish a "p=reject" DMARC policy. Nonetheless, they did publish such a policy in early April, and depending on who you ask, either panic and chaos has ensued since, or we're in the first stages of a new "this is how it is" era of mail.
Here's a roundup of posts from me (and a few other folks) on the topic of Yahoo's recent DMARC policy change.
DMARC: Please Be Careful! June 10, 2013. My high level overview of operational considerations for domain owners when implementing a DMARC policy.
Who uses a Yahoo from address? April 10, 2014. Andrew Barrett reports on his sampling of a live mail stream to identify groups affected by the Yahoo policy change.
Yahoo Statement on new DMARC Policy. April 12, 2014. A bit of information from Yahoo on why they made this change and their recommendations for what senders may want to do to maximize interoperability with the new policy.
On April 7th, Laura Atkins of Word to the Wise posted "a brief DMARC primer" to help explain the technical concepts related to Yahoo's recent policy change and what this could mean for you.
Surprise! Or was it? I've been warning for a while now that DMARC doesn't play nice with mailing lists. But really nobody, not even me, thought that a big ISP like Yahoo was going to publish a "p=reject" DMARC policy. Nonetheless, they did publish such a policy in early April, and depending on who you ask, either panic and chaos has ensued since, or we're in the first stages of a new "this is how it is" era of mail.
Here's a roundup of posts from me (and a few other folks) on the topic of Yahoo's recent DMARC policy change.
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