html-email-templates

Build HTML email templates with table-based layouts and inline CSS.

6|2|Updated Apr 10, 2026
One-click install
npx skills add https://github.com/maltehedderich/master-class-agents --skill html-email-templates
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: html-email-templates
Source: https://github.com/maltehedderich/master-class-agents/tree/main/skills/html-email-templates
Command: npx skills add https://github.com/maltehedderich/master-class-agents --skill html-email-templates

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Inconsistent rendering of HTML emails across major clients leads to broken layouts and poor user experience; this skill provides a structured approach to build and review email templates that reliably render in critical clients.

Core Features & Use Cases

  • Bulletproof templates through table-based layouts, inline CSS, and Outlook fallbacks.
  • Review and debugging to diagnose cross-client rendering issues and apply fixes.
  • Use Case: building transactional emails with proper preheaders, accessible markup, and robust fallbacks.

Quick Start

Create or inspect an HTML email template that must render in Outlook and Gmail, starting from a basic two-column layout.

Frequently Asked Questions about html-email-templates

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
Why does my HTML email break in Outlook and how do I fix the rendering?

HTML email rendering breaks in Outlook due to its Word-based engine; fixing this requires enforcing table-based layouts, inline CSS, and Outlook-specific fallbacks for consistent display across major clients.

How do I build a bulletproof HTML email template for Gmail and Apple Mail?

Build bulletproof HTML email templates by using table-based layouts, inline CSS, and accessible markup to ensure reliable rendering across transactional, lifecycle, and marketing emails in Gmail and Apple Mail.

Do I need preheader text and alt text for transactional emails?

Transactional emails require preheader text and alt text to improve accessibility and user experience, ensuring critical message context is available even when images are blocked by email clients.

What is the best way to diagnose cross-client HTML email rendering issues?

Diagnose cross-client HTML email rendering issues by reviewing table-based layouts and inline CSS against client-specific fallbacks, systematically identifying and fixing markup that fails in Outlook or mobile clients.

Can I use modern CSS frameworks instead of inline CSS for email design?

Modern CSS frameworks fail in email design because major clients strip external styles; applying inline CSS directly within table-based layouts is required to enforce robust, accessible markup.

When should I use table-based layouts for HTML emails?

Use table-based layouts for HTML emails whenever cross-client compatibility is required, as this approach provides the structural stability needed to pass through aggressive CSS stripping by clients like Outlook.