Email Spam Tester

Test an email before it goes out.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Get Test Address: Reserve a single-use address to send a draft message to. Returns the address and the URL its report will appear at. The address accepts exactly one message and expires after an hour.
  • Wait For Report: Wait until the message arrives and has been analysed, then summarise it. Blocks rather than returning "not ready yet": an agent told to poll writes a sleep loop and usually gives up b
  • Get Report: Read an existing report by its slug, without waiting.

What data it sees

Do you need an account

No: the server works without sign-in

Test an email before it goes out. Reserve a single-use address, send the message you were about to send your list, and read the report: a spam score from SpamAssassin and Rspamd, 41 checks with the RFC section behind each finding, and a plan of what to fix first.

Four tools: get_test_address, wait_for_report, get_report, get_message_source. No key and no account; the report link is permanent. Web version and docs at https://email-spam-tester.com.

How to connect

How to connect Email Spam Tester to Claude

The server address to paste into Claude settings:

https://email-spam-tester--tanichev.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Email Spam Tester to ChatGPT

The server address to paste into ChatGPT settings:

https://email-spam-tester--tanichev.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Email Spam Tester to Cursor

The server address to paste into Cursor settings:

https://email-spam-tester--tanichev.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (4)

Raw names from tools/list. Only developers need these.

get_test_addressReserve a single-use address to send a draft message to. Returns the address and the URL its report will appear at. The address accepts exactly one message and expires after an hour. lang is the language the fix plan will be written in, as an ISO code ("de", "pt-BR"). Set it to the language the person you are working for reads: it decides the plan and the per-check findings on the page they open, and it has to be decided now because the message arrives minutes later over SMTP, which carries no hint of who is waiting for it. Unknown codes fall back to English rather than failing. What you get back from wait_for_report stays English whatever you set: the check lines it quotes come from the report's `summary` field, which is English by design so a script reading it reads the same words every time. The person following report_url sees their own language.
wait_for_reportWait until the message arrives and has been analysed, then summarise it. Blocks rather than returning "not ready yet": an agent told to poll writes a sleep loop and usually gives up before the analysis finishes.
get_reportRead an existing report by its slug, without waiting.
get_message_sourceThe message exactly as it was received: headers, both bodies, source. Useful when a finding points at a header and the agent needs to see what it actually sent rather than what it believes it sent.