Published Monday, August 04, 2025 by Al Iverson. Click here to subscribe.

 
Hey, friend! It's that time again! Here's what's happening in the world of email deliverability as found on Al Iverson's Spam Resource.

This week: AT&T's email transition to Yahoo is complete, there's a cool site for fans of plain text email, and then, for tools, technology, and best practices, I'm talking TTLs, double opt-in and a cool tool from Groups.io.

Care about making the world a better place? Me, too, and here's your final reminder that I'll be at Netroots Nation 2025 this week in New Orleans. Find more info here, and maybe I'll see you there!

Thanks for reading!
 
ATT to Yahoo transition completed
The transition is complete, according to my little widget! All AT&T consumer mailbox domains now have MX records that point directly to Yahoo Mail's infrastructure. The transition was announced back on June 24th, and here we are, just ... read more
Sending plain text emails in 2025
I'm not really anti-HTML email. Like many folks with a long history in the linux/unix world, once upon a time I used text-based email clients like pine and mutt, but that was a lonnnnng time ago. But this isn't just about me! If you think plain text is better than HTML, then boy have I got a site for you: Use plain text email. read more
Cool Tool: Email Provider Status from Groups.io
Groups.io is a provider of email discussion group hosting that has been around a good long while (launched in 2014) and serves up rather a lot of email. That gives them insight into delivery delays and connection problems relating to internet service providers and mailbox providers both big and small -- the places where their users and those users' ... read more
When to Double Opt-in
I'm a strong advocate for double opt-in, a very specific email and permission verification process. The process works by, upon receiving an email address in a signup form, sending a confirmation email out to the address, and not considering the person a subscriber unless they positively respond to the email message. (Find more detail on that ... read more
DELIVTERMS: TTL
Today on DELIVTERMS, the series here on Spam Resource where we help decode email and deliverability terminology, we're digging into something that's absolutely everywhere in DNS but rarely explained in plain language: TTL. It stands for "Time To Live." And in DNS, it determines how long a piece of information should be considered valid ... read more
AOL Adopts New DMARC Policy
A bonus article from the archives (Tuesday, April 22, 2014)
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 solid advice on how to deal with this change: ... read more
And that's all for now! Thanks for reading.

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Mailing address: 1522 W Jarvis Ave, Chicago IL 60626. I am not a lawyer and this is not legal advice. Duh. All opinions are mine alone and do not necessarily represent the views of any group, company, organization or other person.