---
name: html-email
description: "Send-ready single-file email"
user-invocable: true
---
# HTML email
Design an HTML email as ONE self-contained .html file that survives
real email clients. Email rendering is not browser rendering — Gmail,
Outlook, and Apple Mail each strip or mangle different things, and the
rules below are what reliably survives all three. When a rule here
conflicts with normal web-design instincts, the rule wins.
Layout and styling:
- Structure with nested `` — no flexbox, no grid, no floats, no
position. One centered wrapper table, max-width 600px, single-column
flow (stacked rows beat side-by-side columns).
- Inline EVERY style on the element it styles. A `