Guides
Gmail Tabs, Explained for Newsletter Creators
Primary, Promotions, Updates — what Gmail's tabs are, how classification actually works, why the same email lands differently for different readers, and what it means for your metrics.
How to Check If Your Newsletter Lands in Spam (5 Methods, 4 of Them Free)
Your ESP says 'delivered' even when your email is in the spam folder. Five practical ways to find out where your newsletter actually lands — including the seed-inbox method.
The Newsletter Deliverability Checklist: 12 Checks Before Your Next Send
A practical deliverability checklist for newsletter creators: authentication, Gmail's bulk-sender rules, list hygiene, monitoring. Each item says what to do, how to verify it, and how often.
Substack Posts Not Showing Up in Google? Here's Why, and How to Fix It
You google your own headline and find nothing. How Google indexing actually works for Substack publications, how to check your coverage, and the steps that get posts indexed.
Why Is My Newsletter Going to the Promotions Tab? (And What You Can Actually Do)
Your open rate dropped and readers say they can't find your newsletter. Here's how Gmail's Promotions tab actually works, what moves placement, and what doesn't.