The Letters blog

Notes on email, design & AI.

Playbooks, product updates, and opinions on making email that people actually want to open.

FEATURED · PLAYBOOKThe anatomy of a welcome email that converts.
Playbook

The first email sets the tone for the whole relationship. We broke down 200 high-performing welcome emails to find the patterns that actually move open and click rates — and how to recreate them in minutes.

Mar 14, 2026 · 6 min read
Read the playbook
PRODUCTIntroducing AI flows
Product

Design entire automated sequences — not just single emails — from one brief.

Mar 10 · 4 min
GUIDESPF, DKIM & DMARC, explained
Deliverability

A plain-English guide to the three records that decide whether you land in the inbox.

Mar 4 · 7 min
OPINIONWhy your emails look generic
Design

The five template habits that make brands blend together — and how to break them.

Feb 26 · 5 min
NEWSLetters raises its seed
Company

We are putting it all into making on-brand email effortless for every team.

Feb 18 · 3 min
PLAYBOOKAbandoned cart, done right
Playbook

Timing, copy, and incentives — the recipe behind a flow that recovered $1M+.

Feb 11 · 6 min
DESIGNA field guide to email type
Design

Choosing fonts that survive every client and still feel like you.

Feb 3 · 5 min