Sponsor Renewal + ESP Deliverability

July 9, 2026 |
Keenen Charles

This week there's a look at deliverability across email service providers, a reminder that renewals are where the money is, and a few other interesting reads.

And the featured newsletters this week cover motorsport, travel, politics, and more!

📰 News & Articles

Which ESP is Best for Deliverability?

Spoiler: It's more about the sender than the ESP.

The Thing About Sponsor Revenue No One Ever Talks About

People who’ve done millions in ad sales all say that renewals are where most of your profit comes from.

My newsletter started as a hobby. It became a multimillion-dollar business

The founder of Mostly Metrics and CEO of Mostly Media shares how he turned a hobby into a business that makes more than his CFO job.

I tried self-hosting email and quickly remembered why people don't

A tech journalist shares his experience with self-hosting email and why it’s not for most people.

⭐ Featured Newsletters

The A List

Notes and Links

Partisan Hex

A partisan ass with a bad attitude.

The Dann Chronicles

Curated insights on tech, culture, and the shifting internet.

The Race

Motorsport coverage that cannot be beaten

Gone With The Wynns

A couple of explorers and cultivators of curiosity

See Ya

This is our weekly newsletter covering tips and tools for newsletter operators and everything else happening in the email newsletter space. Hope you enjoyed it!

Keenen Charles

Keenen is the creator of InboxReads and a believer in the future of newsletters and email for sharing great content.

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