Domain registrar GoDaddy has announced that as of April 2025, all new domains registered via them will come with a DMARC record by default, with a p=quarantine policy. In my opinion: This is ve…
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(See new info at end!) Hey, big senders! It's time for another update regarding enhanced sender requirements put forth by a large mailbox provider. This time around, it is Fr…
Google has very recently added new diagnostic details to its DMARC aggregate reports, and they're a big help for troubleshooting. Instead of digging through scattered email l…
It's byline time! Thank you to both Manufacturing.net and Total Retail for giving me the opportunity to talk to their audiences about DMARC adoption rates and the real-worl…
By now, you've probably heard: Microsoft has officially joined the club. Following in the footsteps of Google and Yahoo, Microsoft has announced new requirements for high-vol…
It's been a light week as far as me posting things on Spam Resource. The reason for that? I've been so busy with the release of Valimail's 2025 Disinformation and Ma…
More than one recorded video this week, huh? My apologies; I’m traveling this week and time to create content has been cut a bit short. Also, I’m admittedly quite proud of everyt…
Did you know that the latest version of the PCI (Payment Card Industry) Data Security Standard references DMARC? But it wasn't quite clear to me if DMARC is specifically requ…
Webinar alert! Coming up on February 19th, I'll be hosting a webinar, along with Ed Fisher from Microsoft, and we'll talk about: How does DMARC work and why is it importa…
Author Domain Signing Practices (ADSP) is an add-on to DKIM email authentication. It provided domain owners with the ability to define a policy that asks mailbox providers to di…
As I've done for a while now, I continue to track DMARC adoption month-by-month by caching DNS data (including DMARC records) for the " top ten million domains " da…
I was talking to a friend last week about DMARC reports. Her friend, who’s a bit of an email nerd (yay!) runs his own email domain and has DMARC reports for his own domain coming…
The messaging around inbox placement and authentication has always been nuanced, and it's easy to misunderstand. To be clear, email authentication doesn't guarantee inbox…
Comcast is updating the DMARC policy for comcast.net, the domain used for Comcast Xfinity customer mailboxes. You may recall that Comcast has a number of domains , but that it ul…
Validity's back with another webinar you'll want to check out! This time around, the topic is DMARC ... and beyond! Join Guy Hanson (Validity), Seth Blank (Valimail), and…
It's great to see folks writing about DMARC and how important it is to email security and deliverability. It's especially wonderful to have been given the chance to inclu…
Bleeping Computer’s Sergiu Gatlan reports on a dire DMARC warning from the US National Security Agency (NSA): It seems that North Korea loves to send phishing emails, and they se…
Here's a new and unique question that I was just asked: What about DMARC at the sub-subdomain level, multiple levels deep? If I have a DMARC record for my subdomain e.spamres…
