• CODE
  • DELIVERY
  • LAYOUT
  • HUMAN

How to validate email HTML and spam scores with your AI

Connect Mailtrap to your agent to pull raw email data from your sandbox. Your AI handles the heavy lifting of inspecting code and spam triggers.

Ask AI about this page

Short answer

How can I use AI to check my email HTML and spam scores?

Your agent pulls the raw HTML and spam analysis from your Mailtrap sandbox messages to find broken layouts or high spam scores. This lets you catch delivery problems before they hit real inboxes. You'll see exactly where the code fails or why a filter might flag you.

Where every issue lands.

The results of your inspection.

The AI categorizes your findings into actionable buckets.

CODE

Broken HTML detected

The AI finds unclosed tags or broken layouts in the raw source. You get a list of specific lines that need fixing.

DELIVERY

Spam score alerts

Your agent flags suspicious keywords or high spam scores. It tells you exactly which elements are triggering filters.

LAYOUT

Rendering mismatches

The AI compares the HTML structure against expected patterns. It identifies where the visual output might break in different clients.

HUMAN

Manual fixes required

The AI highlights the specific code blocks that need your eyes. You decide how to rewrite the content to improve deliverability.

The workflow

What your AI does when the email arrives.

The AI moves from finding the message to deep-diving into its structure.

  1. Find the message

    Your agent looks through your Mailtrap sandbox to find the specific test email you just sent.

    list_sandbox_messages

  2. Pull the details

    The AI grabs the specific metadata and spam analysis results for that message.

    get_message_details

  3. Read the source

    Your agent pulls the full raw HTML to inspect the actual code structure.

    get_message_html

  4. Analyze and report

    The AI compares the HTML and spam data to find errors or risks.

    get_message_html

Try it

Copy these to start.

Use these prompts to kick off your inspection.

Starting points

These are opening lines. Swap out the specific mailbox or message ID to match your current test.

Mailtrap Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_Ad5Juop0aQx2ay54WiDoJvVK7YtPyDjMRVyTPy0Y/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Mailtrap capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "mailtrap-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_Ad5Juop0aQx2ay54WiDoJvVK7YtPyDjMRVyTPy0Y/mcp"
    }
  }
}
Copy into chat04

  • List the latest messages in my Mailtrap sandbox and tell me which ones have high spam scores.

  • Get the HTML for the last message in my sandbox and check for unclosed div tags.

  • Look at the spam analysis for message ID 12345 and tell me why it might be flagged.

  • Check the raw HTML of my most recent sandbox email for any broken image links or layout issues.

  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Start here

Connect Mailtrap once, then ask.

Just link your Mailtrap account once. Your credentials stay encrypted, and you can immediately start asking your agent to inspect your sandbox data.

Connect Mailtrap to your AI

FAQ

How this task behaves

  • 01

    Can the AI fix the HTML for me?

    No. The AI identifies the errors and points them out, but you have to make the actual changes in your code editor.

  • 02

    Can the AI send emails through Mailtrap?

    No. This MCP only reads data from your sandbox to help you inspect what has already been captured.

  • 03

    Does the AI see my actual production emails?

    No. It only has access to the messages captured in your Mailtrap sandbox via the provided tools.

  • 04

    Can the AI delete messages in my sandbox?

    No. The available tools only allow for listing, getting details, and reading HTML.

  • 05

    How does the AI know if an email is spam?

    It reads the spam analysis data provided by Mailtrap for each captured message.

  • More questions about Mailtrap? See everything the Mailtrap Connector can do

Connect Mailtrap to Claude, Cursor, ChatGPT & more