Spam Resource: All Things Deliverability

Published Sunday, May 10, 2026 by Al Iverson. Click here to subscribe.

More on DKIM2: VERP, async bounces, signatures and hops

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. Thanks for reading!

This Week's Featured Story

More on DKIM2: VERP, async bounces, signatures and hops
As you might have seen me mention on Linkedin this week, I'm still working to fully wrap my head around DKIM2, specifically thinking about a couple of different things: the impact on DMARC and the impact on ESP platforms. Let me tell you what I know and what I don't know.

And More to Read

ICYMI: BIMI success stories and data
Curious about BIMI adoption rates? Looking for BIMI success stories? The fact is, BIMI helps boost email engagement. And if you're looking for the data to make the business case for BIMI, this recent webinar has what you need to help you support the argument for implementing a BIMI logo.

GMX/WEB.DE/mail.com moving to inbound DMARC enforcement
Staff from mailbox provider GMX/WEB.DE/mail.com (1&1 Mail & Media GmbH) have just announced on the Mailop list that they'll begin enforcement of DMARC checks in a phased rollout over the coming weeks. What does this mean? It means that if you publish a DMARC policy of p=reject for your email domain, they will now reject email from that ...

Zeta: Q1 2026 Email Marketing Benchmarks
Zeta Global just posted their latest email and SMS benchmark report. Curious about open, click and unsub percentages across a whole bunch of industry sectors? Zeta's got that. Retail, Financial Services, Travel and Hospitality, Media and more. It's good stuff, especially if you're in any covered industry segment and wondering if your campaign results ...

Plus A Bonus Article From the Archives (October 2022)

Zone (Estonia): Domains and BIMI Support
Estonian webhost and mailbox provider Zone now supports BIMI and will display a sender logo in Zone Webmail, if they're able to. VMC is required. Find more details here.

As always, 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. No chimps, bees or clouds were harmed in the crafting of this 100% artisanal and protein free email newsletter.