As this year rolls its way toward the exit, it is time for my annual roundup of the most popular blog posts published in the year 2025.
A lot happened this year, in the world of deliverability. Yahoo Mail is growing, having fully integrated AT&T mailboxes into their backend and with a planned integration of Comcast mailboxes on the horizon. Google stepped up their enforcement of email sender requirements as of November, and Microsoft moved quickly, starting in April: Announcing new sender requirements, then jumping to rejecting non-compliant email messages from just a month later, in May.
2025 is also the year that Spam Resource reached five million views. Honestly, the raw "hit counter" has no doubt been accelerated by the growth of A.I.-related scraping, as artificial intelligence quickly becomes integrated into everything we do, including deliverability and SEO. So while I'm not convinced that I've for sure had five million "human reads" of Spam Resource, it's still fun to watch the little dial spin. And thank you to everyone who helps contribute to that read count.
And now, here are the top five blog posts from Spam Resource in 2025.
Number Five: Thank you, Chip
My friend, and one time boss, Chip House passed away in January, 2025. His deep marketing expertise led him to multiple CMO roles, but also, he originated the deliverability team and its practices back at email service provider ExactTarget, and later brought me into the fold to manage the team as director of deliverability. He was a kind and smart leader. His mentorship, guidance and friendship meant a lot to me. He was a damn good drummer, too. It warms my heart that so many people were interested in learning about Chip through my blog post.
Number Four: Fun with data: Top Mailbox Providers in Japan
If you know me, you know that I love having fun with data! For this data snapshot, I took the top ten million domains, looked up the MX records for all of the .jp domains in the list, and rolled it all up to give us a ranked snapshot based on how many domains had their inbound mail hosted by a given mailbox provider. This rough ranking gives us some insight into who the biggest email domain hosted are in Japan, by one measure.
Number Three: 2025 MAGY Sender Compliance Guide
Mailbox providers have been getting more serious about sender compliance over the past few years. What once could be called "best practices" are now better known as published bulk email sender requirements, with Microsoft "joining the party" in a big way in 2025. This is my guide meant to help email senders comply with these modern sender requirements.
Number Two: Five email newsletter must-haves in 2025
I'm a big fan of email newsletters and I subscribe to many of them. Some of them don't always get things right, with odd branding choices or missing functionality that makes it harder to share and enjoy them. Here are my thoughts.
Number One: Yahoo Mail to absorb Comcast subscriber mailboxes
Comcast's email inboxes are not going away, but at some point in the near future, their mailbox infrastructure will come to be hosted by Yahoo Mail. Thus, if you want to reach the inbox when mailing Comcast subscribers, at some point soon, compliance with Yahoo's email sender requirements will come into play. Not everybody realizes that Yahoo is kind of a big deal.
Bonus: Top 5 Ways to Check your Email Reputation
This just missed making the top five cut, but it's a very important bit of guidance, as I get asked oh-so-constantly: how DOES an email sender actually check their email reputation? There's a lot of bad advice out there. Mine is better, if I do say so myself.
Thank You
We've lived through interesting times, this year, for a multitude of reasons. Narrowing things down only to the deliverability landscape and email ecosystem, things were still interesting -- and changing constantly. It can be tough to keep up with changes in email sender requirements, and it has been my pleasure to help keep you aware of, and help explain, these new changes and mandates. I hope you found my guidance and content useful, and I look forward to continuing to share what I know as we ride off into 2026!
As this year rolls its way toward the exit, it is time for my annual roundup of the most popular blog posts published in the year 2025.
A lot happened this year, in the world of deliverability. Yahoo Mail is growing, having fully integrated AT&T mailboxes into their backend and with a planned integration of Comcast mailboxes on the horizon. Google stepped up their enforcement of email sender requirements as of November, and Microsoft moved quickly, starting in April: Announcing new sender requirements, then jumping to rejecting non-compliant email messages from just a month later, in May.
2025 is also the year that Spam Resource reached five million views. Honestly, the raw "hit counter" has no doubt been accelerated by the growth of A.I.-related scraping, as artificial intelligence quickly becomes integrated into everything we do, including deliverability and SEO. So while I'm not convinced that I've for sure had five million "human reads" of Spam Resource, it's still fun to watch the little dial spin. And thank you to everyone who helps contribute to that read count.
And now, here are the top five blog posts from Spam Resource in 2025.
Number Five: Thank you, Chip
My friend, and one time boss, Chip House passed away in January, 2025. His deep marketing expertise led him to multiple CMO roles, but also, he originated the deliverability team and its practices back at email service provider ExactTarget, and later brought me into the fold to manage the team as director of deliverability. He was a kind and smart leader. His mentorship, guidance and friendship meant a lot to me. He was a damn good drummer, too. It warms my heart that so many people were interested in learning about Chip through my blog post.Number Four: Fun with data: Top Mailbox Providers in Japan
If you know me, you know that I love having fun with data! For this data snapshot, I took the top ten million domains, looked up the MX records for all of the .jp domains in the list, and rolled it all up to give us a ranked snapshot based on how many domains had their inbound mail hosted by a given mailbox provider. This rough ranking gives us some insight into who the biggest email domain hosted are in Japan, by one measure.Number Three: 2025 MAGY Sender Compliance Guide
Mailbox providers have been getting more serious about sender compliance over the past few years. What once could be called "best practices" are now better known as published bulk email sender requirements, with Microsoft "joining the party" in a big way in 2025. This is my guide meant to help email senders comply with these modern sender requirements.Number Two: Five email newsletter must-haves in 2025
I'm a big fan of email newsletters and I subscribe to many of them. Some of them don't always get things right, with odd branding choices or missing functionality that makes it harder to share and enjoy them. Here are my thoughts.Number One: Yahoo Mail to absorb Comcast subscriber mailboxes
Comcast's email inboxes are not going away, but at some point in the near future, their mailbox infrastructure will come to be hosted by Yahoo Mail. Thus, if you want to reach the inbox when mailing Comcast subscribers, at some point soon, compliance with Yahoo's email sender requirements will come into play. Not everybody realizes that Yahoo is kind of a big deal.Bonus: Top 5 Ways to Check your Email Reputation
This just missed making the top five cut, but it's a very important bit of guidance, as I get asked oh-so-constantly: how DOES an email sender actually check their email reputation? There's a lot of bad advice out there. Mine is better, if I do say so myself.Thank You
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