
Which Parts of Email Marketing Should AI Never Write?
AI can write subject lines, newsletters and product descriptions in seconds. But there are still parts of email marketing where human judgement matters more than speed.

AI can write subject lines, newsletters and product descriptions in seconds. But there are still parts of email marketing where human judgement matters more than speed.

From 'spam words cause spam' to 'Tuesday is always the best day to send', email marketing is full of advice that refuses to disappear. Here's what the evidence actually says.

How long should a marketing email be? We analysed industry research, campaign data, and best practices to understand how email length varies across industries—and when shorter or longer emails perform better.

We analysed 500 real marketing emails to identify design and copy patterns in high-performing campaigns. Key findings on CTA count, button colour, word count, image ratio, sender names, and subject line length.

We analysed 100 email subject lines across seven psychological categories to understand what makes people open emails. Discover the patterns, examples, and practical takeaways you can apply to your next campaign.

Rushed email campaigns cost businesses thousands in lost revenue, damaged sender reputation, and subscriber churn. Here is why slowing down produces better performance and a comprehensive framework for planning campaigns that actually deliver.

Gmail, Apple, and other email providers are increasingly using AI to summarize messages before people read them. Here's how email marketers can adapt.

Most weekly newsletters feel like obligations — to write and to read. Here's how to build one subscribers genuinely want in their inbox every week.

Starting email marketing from scratch? This complete guide covers everything from choosing an ESP and warming IPs to building high-converting onboarding flows and tracking systems.

Most email ‘best practices’ are outdated. Here’s what actually makes an email work in 2026 — with real examples.

Inboxes are flooded with AI-generated emails. Learn why sounding human is now your biggest competitive advantage—and how to actually do it.

How long should marketing emails actually be? Discover the ideal email length based on real data and see examples of short SaaS, ecommerce, and newsletter emails.

Why do some emails get ignored while others drive clicks instantly? Discover the psychological triggers behind high-performing email campaigns.