getreadystack/outlook-email-html-lint repository overview

⁠Outlook Email HTML Lint - Classic vs New

Classic Outlook renders with the Word engine, the new Outlook with WebView2. Lint one email file against both at once, line by line, before you send.

⁠Run

docker run --rm -v "$PWD":/work getreadystack/outlook-email-html-lint /work/file

The same 33 rules as the VS Code extension, in a container. Mount a folder on /work.

⁠Free

• Check the open email file against both Outlook engines and get every finding with a suggested fix - no key, no limit.
• --rules lists every rule

⁠With a licence ($29 once)

• Scan the whole template library in one pass, export a client-ready CSV/JSON/HTML report, and emit CI output that can stop a broken template.

docker run --rm -e READYSTACK_LICENSE=<key> -v "$PWD":/work getreadystack/outlook-email-html-lint --dir /work --ci

Email on Acid Basics is $99/month and Litmus Core starts at $500/month (checked 2026-09-07).

⁠Use from an AI agent (MCP)

Claude Code · Cursor · Windsurf · any MCP client - add to your MCP config:

{ "mcpServers": { "outlook-email-html-lint": { "command": "npx", "args": ["-y", "@readystack/outlook-email-html-lint", "--mcp"] } } }

Tools: check_text and check_file (free) · check_dir (licence). The agent gets every finding with the line number.

⁠Use in CI

- name: Outlook Email HTML Lint - Classic vs New
  run: npx -y @readystack/outlook-email-html-lint --dir . --ci

(container: docker run --rm -v "$PWD:/work" getreadystack/outlook-email-html-lint --dir /work --ci)

The folder sweep, reports and CI mode need one licence — one payment, no subscription. Set READYSTACK_LICENSE=<key> or run --license <key> once.

Get a licence⁠