Spam Resource: All Things Deliverability
Since 2001, a blog and email newsletter published by Al Iverson. With over 500,000 words, collected in 1500+ articles and viewed more than four million times (so far), focused on the topics of email deliverability, email authentication and DMARC, stopping spam, dealing with spam folder and spam blocking issues, complying with modern sender requirements, and much more. Thanks for visiting!

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The maintainers of the "NixSPAM" blocklist (with a DNSBL zone of ix.dnsbl.manitu.net) have decided to shut down. As of January 16, 2025, their website at  nixspam.net  …
For those interested in BIMI (Brand Indicators for Message Identification) sender logos, you likely already know that for maximum possible display of your BIMI sender logo, you …
Here it is, the first episode of "Fun with Data" for 2025. Today, I present to you a link to a downloadable list containing the top Microsoft Outlook.com (Microsoft OLC…
Here's a lightly anonymized version of a true story that I overheard recently: Sender reaches out to big ISP X, asking for help with deliverability issues. ISP offers to inve…
Back a few months ago, we warned all you email marketing senders to hold off on making any significant changes to your sending infrastructure and marketing strategy, so as not to…
It's always great to see another mailbox provider supporting BIMI sender logos! This time around, it is French telecommunications provider SFR (Société Française du Radiotélé…
Davey Winder writing for Forbes recently shared a tale of woe brought to his attention wherein an email sender points out that email messages they're sending to Gmail subscr…
Do you want to help protect and improve the email ecosystem? Well, you're in luck! Because for my most recent Valimail "Ask Al" video , I sat down with rock star de…
A gentleman named Florian Effenberger , a long time "free and open source software enthusiast," has put together a neat little guide on email reputation and deliverabil…
Here are my predictions for what I think the deliverability landscape will look like in 2025. People always ask for these types of predictions and no matter what we think, they e…
It's time for yet another walk down memory lane! This time around I just wanted to quickly recap a few of the important things that happened in the world of deliverability in…
Here's more context related to what folks were reading on the Spam Resource blog in 2024. This top five is a bit different -- the previous post highlighted the top five most …
Wow! Spam Resource content has been viewed around 670,000 times in the past 12 months, according to my very simplistic Blogger tracking. Thank you all for helping to make that ha…
Inbox Expo is back, and they're bringing the excitement to Austin TX, May 21-23. Known as one of the top events in the email marketing world, Inbox Expo 2025 is where email …
Hey! It's Al Iverson here and I hope you'll allow me to share a quick "thank you" for reading the Spam Resource blog and email newsletter throughout 2024. I rea…