Version 18 of ARC Specification Published

As first reported on the arc-spec.org website, on October 2nd the IETF’s DMARC Working Group published version 18 of the ARC specification document, incorporating the changes suggested during the Working Group Last Call (WGLC).  There are many small language changes to clarify concepts or bring usage in line with other IETF documents, such as Email […]

Working Group Completes Last Call For ARC Specification

The DMARC Working Group has completed Last Call for the ARC specification. This means that when the final consensus changes are incorporated, the document will be submitted for approval and publication by the IETF. It is possible that the specification might be published before the next IETF meeting in November, though perhaps more likely between then […]

New ARC Implementations at IETF 99 Hackathon

An Authenticated Received Chain (ARC) table was organized at the weekend hackathon held before the IETF 99 meeting in Prague this week. ARC is an official work item of the IETF DMARC Working Group, and will be discussed during the working group meeting Thursday morning. Participants from two different vendors worked on new implementations of […]

How Many From: Addresses Are There?

When first exploring email authentication, even people with a technical background find that there’s a lot of niche terminology that has to be picked up. This post will try to explain the different terms used for addresses that are associated with email messages. How Is An Email Message Like A Postal Letter? When your postman […]

Email Vendors: Time to Build in DMARC

DMARC is extremely useful, yet I’ve heard some vendors are putting their implementations on hold because of the IETF DMARC working group. You really shouldn’t wait though — it’s been in wide use for nearly three years, enterprises are looking at DMARC for B2B traffic, and the working group charter is limited in it’s scope […]