Spam Resource: All Things Deliverability

That's a question I get asked from time to time, so I figured this would be a good place to link to numbers. As reported on CNET today : "The company said it has 110 [million] daily active email users, though that figure includes users on every device, including deskto…

Now that Yahoo and AOL have both implemented "p=reject" DMARC policies, Google has modified their Google Groups discussion group service to "play nice" with posts from subscribers at domains behind a restrictive DMARC policy. If Google took no action with r…

Today, AOL announced that they, too, have adopted a "p=reject" DMARC policy . The same considerations previously mentioned as applying to Yahoo Mail users now apply to AOL users as well. In today's AOL postmaster blog post , Vishwanath Subramanian offers some sol…

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 poli…

All this talk about Yahoo's recent DMARC policy change got a friend to ask me about her domain name and whether or not this change has any impact on her. Ellen asked me, "Does this mean anyone with a personal domain sending through an ISP who implements DMARC with a p…

Yesterday, Yahoo posted " an Update on our DMARC Policy to Protect Our Users ." They've also posted " Yahoo DMARC Policy Change - What Should Senders Do ." (H/T: WTTW )

How dare Yahoo update their DMARC policy without warning the internet community of the potential fallout from doing so. At least, that's what some other folks have said. My take on it is more prosaic. I figure it's your domain name, you're free to do whatever you w…

Yahoo's recent DMARC policy change didn't just break somebody's church list. It also caused problems for every single discussion group hosted by OnlineGroups.net . Chief Wrangler Dan Randow and his team didn't take that sitting down. They didn't cry, shake …

In the next chapter in the story of Yahoo's recent DMARC policy change , Andrew Barrett shares a snapshot of what percentage of an example email service provider's clients send mail via the ESP using a Yahoo.com from address.

Yahoo's recent DMARC policy changes have made it so that Yahoo subscribers will now have trouble participating in old fashioned LISTSERV-style discussion lists. When a Yahoo user posts to your discussion list, very few subscribers will receive that message, because any ISP …

A few days ago, Yahoo updated their DMARC policy setting to "p=reject." What this means is, mail containing a Yahoo from address is basically no longer considered legitimate if it doesn't contain an authentication signature or if it didn't come from properly i…

I have no problem helping a client address deliverability issues, even if their industry or politics encompass something I don't personally approve of.  My friend Mickey Chandler and I (who have very different political affiliations) have worked capably together to help ad…

The WHOIS process and protocol isn't just some nerd thing that goes back a hundred years; it's a valuable public directory for savvy internet users to be able to identify who owns a given domain nam e . Spam and security investigators find it a valuable tool -- even if…