The IETF’s DMARC Working Group has submitted documents to update the DMARC protocol to the RFC Editor. For reference, here is a high-level overview of the changes introduced in these updates: Informational ⇨ Standards Track Public Suffix List replaced by DNS Tree Walk and Public Suffix Domains (PSD) Several tags deprecated: pct=, rf=, ri= np= […]
DMARC.org at 8th JPAAWG General Meeting
JPAAWG held it’s 8th General Meeting in Kochi, Japan on the 4th and 5th of November, 2025. This was the tenth year that DMARC.org was able to provide information about email authentication to Japanese email professionals. The presentation included the following sections: Final steps of the IETF’s DMARC Working Group How DKIM replay attacks work […]
DMARC.org at 7th JPAAWG General Meeting
The seventh JPAAWG General Meeting was held in Sapporo, Japan on November 11th and 12th of 2024. Many attendees participated in person over both days of presentations and knowledge-sharing sessions, and additional participants accessed the sessions online. This year’s presentation covered dramatic changes around the IETF‘s DMARC Working Group, and updates on a new protocol, […]
New Authentication Protocol: DKIM2
Since late 2021 there has been an increase in the use of DKIM Replay Attacks. While the potential for DKIM Replay Attacks was noted in the original DKIM RFC, bad actors were finally using them in ways that caused real trouble for large mailbox operators. A number of proposals to address this threat were written […]
Microsoft Allows 365 Admins To Accept ARC Forwarders
Back in October 2019, Microsoft included ARC support in their Microsoft 365 Roadmap, stating that “[ARC] is now enabled for Office 365 hosted mailboxes.” But at that time it could only be used between Office 365 tenants, or from Microsoft’s in-house services. However in June of 2022 they made it possible for each tenant to […]
DMARC.org at Fifth JPAAWG General Meeting
The fifth JPAAWG General Meeting was held on November 7th and 8th in Nagasaki, Japan. For the first time since the start of the COVID-19 pandemic, DMARC.org was able to deliver a keynote presentation in person. A strong conference program generated excellent attendance, both in-person and online, and the facilities were top notch. This year’s […]
DMARC Policies Up 84% for 2021
Over the course of 2021 the number of valid DMARC policies observed in use rose by 84%, to a total of nearly 5 million unique records, compared to the prior calendar year. This doubles the percentage increase seen in 2020, and reflects an acceleration of growth in the second half of the year. Starting with […]
DMARC Announced Ten Years Ago
On January 30th of 2012, fifteen organizations announced the working group they had formed, and the first version of the protocol they had produced. This was the public kickoff of both DMARC.org and the DMARC protocol. It would grow from just 450 published sending domain policies and 2 billion protected mailboxes after one year, to […]
Thousands of BIMI Records Published During 2021
Brand Indicators for Message Identification (BIMI) enables email senders to have a logo or image of their choosing displayed next to email messages they send to participating mailbox providers. BIMI builds on DMARC and related email authentication standards to ensure that only messages authorized by those senders display such images, so it frequently comes up […]
DMARC policies increase 28% Through June 2021
The number of valid DMARC policies observed in the DNS increased by 28% over the first half of 2021, to a total of 3.46 million, based on analysis of data supplied by Farsight Security. This was double the growth rate during the same period in 2020, when roughly 330,000 new records reflected a 17% increase […]