---
title: Claude for E-Mail Subject Lines
description: "Free guide: an AI + data subject-line system that raised open rates 42%→54%. Get prompts, 12 templates, and QC checks for every send."
---

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## Steal the system that took my newsletter subjects from 42% to 52.98% open rates

*A free step-by-step guide to writing high-performing subject lines using Claude, your own data, and a human in the loop.* 

 

 

#### The Ultimate Guide to High-Performing Newsletter Subject Lines Using Claude

A weekend-length playbook that shows you exactly how I built an AI-powered subject line system for a 190,000-person newsletter - including the prompts, the pattern catalogue, and the 12 template structures I use every single week. 

![Increase your Newsletter Open Rates](https://www.adamshilton.com/hubfs/2026-04-23_13h49_47.png)

Once you've entered your e-mail, you will be redirected to the guide instantly.

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#### What's Inside 

-  The 1-prompt quick win you can paste into Claude today to beat 90% of the subject lines in your inbox. 
- 12 proven template structures with formulas, real examples, and when each one breaks
- 5 emotional angles that force Claude to stop defaulting to the same 2 hooks on every send.  
- The 30-character rule that every one of my 52 top performers obeyed — with zero exceptions.
- 9 quality-check criteria every subject line must pass before it's allowed out the door. 
-  6 banned openers that quietly tanked my open rates for 4 months before I caught them. 
-  1 word swap that beat its alternative by 13 percentage points in otherwise identical sends. 
-  A 4-step maintenance loop to re-run every 10 sends so your patterns never go stale. 

 Once you've entered your e-mail, you will be redirected to the guide instantly.

I respect your privacy. Opt-out any time. 

 

 

Disclaimer:

This is the process I've personally used to improve newsletter performance. Using it doesn't guarantee these results.

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