More on ARC

ARC – Authenticated Received Chain – is a way for email forwarders to mitigate the problems caused by users sending mail from domains with DMARC p=reject.
It allows a forwarder to record the DKIM authentication as they receive a mail, then “tunnel” that authentication on to the final recipient. If the final recipient trusts the forwarder, then they can also trust the tunneled DKIM authentication, and allow the mail to be delivered despite the DMARC p=reject published by the sending domain.
The specification and interoperability testing are progressing nicely and it’s definitely going to be useful for discussion list operators and vanity forwarders soon. It’s not something that’s as likely to help ESPs targeting small organizations and individuals, so all y’all shouldn’t be holding your breath for that.
There’s a more information about it at arc-spec.org and they’ve just published a great presentation with a technical overview of how it works:

(If the embedded presentation above is blank, try reloading the page or read it directly on slideshare.)

Related Posts

February 2016: The Month in Email

Happy March! Here’s a look back at our last month of email adventures.
Feb2016forBlogIt was a busy few weeks for us with the M3AAWG meeting in San Francisco. We saw lots of old friends and met many new people — all in all, a success, despite the M3AAWG plague we both contracted. Hot topics at the conference included DMARC, of course, and I took the opportunity to write up a guide to help you determine if you should publish a DMARC policy.
On the subject of advice and guidance, Ask Laura continues to be a popular column — we’ve had lots of interesting questions, and are always looking for more general questions about email delivery. We can’t tackle specifics about your program in this column (get in touch if we can help you with that directly) but we can help with questions like “Will our ESP kick us off for mailing purchasers?” or “Help! I’m confused about authentication.
Continuing on the authentication front, I noted that Gmail is starting to roll out some UI to indicate authentication status to users. It will be interesting to see if that starts to affect user (or sender) behavior in any way. In other interesting industry news, Microsoft has implemented an Office 365 IP Delisting page. I also wrote a followup post to my 2015 overview of the state of ESPs and purchased lists — it’s worth checking out if this is something your business considers.
I wrote a post about security and backdoors, prompted by both the FBI/Apple controversy and by Kim Zetter’s talk at M3AAWG about Stuxnet. These questions about control and access will only get more complicated as we produce, consume, store, and share more data across more devices.
Speaking of predictions, I also noted my contribution to a great whitepaper from Litmus that explores the state of Email Marketing in 2020.
As always, we looked at some best practices this month. I wrote up some of my thoughts about data hygiene following Mailchimp’s blog post about the value of inactive subscribers. As always, there isn’t one right answer, but there’s a lot of good food for thought. And more food for thought: how best practices are a lot like public health recommendations. As with everything, it comes down to knowing your audience(s) and looking at the relationship(s), which, as you know, is a favorite subject around here.

Read More

Things you need to read

The email solicitation that made me vow to never work with this company again. When sending unsolicited email, you never know how the recipient is going to respond. Writing a public blog post calling you out can happen.
The 2016 Sparkies. Sparkpost is looking for nominations for their email marketing awards. Win a trip to Insight 2016!
5 CAN SPAM myths. Send Grid’s General Counsel speaks about CAN SPAM myths. Personally, asking for an email to unsubscribe is annoying. I never know if the unsubscribe request worked or not. Give me a link any day.
The most misunderstood statistic in email marketing. A good discussion of why raw complaint rates isn’t the metric the ISPs use, and how it can mislead folks about their email program.
Office 365 is expanding it’s DKIM signing. Terry Zink discusses the upcoming changes to how Office365 handles DKIM signatures. This is exactly the kind of changes I was talking about in my 2016 predictions post – background changes that are going to affect how we authenticate email. He even specifically calls out whether or not a particular signature is DMARC aligned or not.

Read More