Spam folder
“Why are emails from acme.com going to spam? Use Yeevu to check the domain.”
Email Deliverability MCP
Email deliverability MCP server that checks any domain inside Claude or ChatGPT
Ask an AI assistant why emails go to spam, and it runs Yeevu’s checks on the domain: MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI and blacklists, with what is wrong and how to fix it.
Free · no account · read-only
- Read-only. It looks up public records and nothing else.
- Can’t change DNS. It has no access to any DNS or email account.
- Stores nothing. No accounts, no saved domains.
- Free. No sign-up and no API key.
Try it
Try the email deliverability checks on any domain
Enter a domain to see the exact answer an AI assistant receives from the server: the same eight checks, the same wording.
Real example
A real answer from Claude using the Yeevu MCP server
Ask
Questions to ask an AI assistant about email deliverability
Talk to it like an email expert. Replace acme.com with the domain to check. The buttons open the app with the question ready; they use Yeevu once it is connected.
DMARC
“Is the DMARC record for acme.com set up correctly? Use Yeevu to check it.”
Blacklists
“Is acme.com on any email blacklists? Use Yeevu to check.”
Full report
“Give me Yeevu’s full email deliverability report for acme.com.”
Who it helps
Email deliverability help for founders, marketers and agencies
| You are | Try asking |
|---|---|
| A founder whose emails stopped arriving | “My invoices from acme.com are landing in spam. What’s wrong with the domain?” |
| A marketer about to send a campaign | “Before I send a newsletter from acme.com, check SPF, DKIM and DMARC and tell me what to fix first.” |
| An agency or IT lead with many domains | “Check the email setup for acme.com, example-client.com and shop-client.com, and list what needs attention on each.” |
How it works
How the MCP server connects to Claude and ChatGPT
MCP (Model Context Protocol) is the open standard AI apps use to call outside tools. Adding Yeevu takes one URL.
Connect. Add
https://to the AI app. The steps for each app are below.mcp.yeevu.com/ mcp Ask. Ask about a domain in plain language. The assistant decides when to use Yeevu’s checks.
Get answers. The assistant reads the results and explains what is wrong and how to fix it.
Open the full report. For an overall score and step-by-step fixes, the assistant links to Yeevu’s free email deliverability report.
Email deliverability MCP server FAQ
Yes. The Yeevu MCP server is free to connect and use, with no account and no API key. Fair-use limits apply: when many checks arrive at once, the server asks the assistant to try again a minute later.
No. Add the server URL to the AI app and start asking. There is nothing to sign up for.
The server stores nothing. Cloudflare, which runs it, keeps standard request logs, and Yeevu’s checker keeps each result for a short time so repeat checks of the same domain are fast.
No. It is read-only: it looks up a domain’s public DNS records and blacklist listings. It has no access to any DNS, hosting or email account. Fixing a problem is done in the domain’s DNS settings, or with Yeevu’s DNS manager.
Any app that connects to remote MCP servers, including Claude (web, desktop and Claude Code), ChatGPT, Cursor, VS Code and Codex. The steps for each are in the setup section below.
The blacklist check queries many blocklists for the domain and its mail servers, which takes about half a minute. The other seven checks finish in about a second, and a single check, such as SPF or DMARC on its own, answers in under a second.
For developers
Set up the MCP server in each AI app
MCP server URL
https://mcp.yeevu.com/mcpPick the app to see its steps.
- In Claude (web or desktop), open Settings → Connectors.
- Choose Add custom connector, name it Yeevu and paste the server URL.
- In a chat, switch Yeevu on from the tools menu, then ask about a domain.
Run this in a terminal, then start a new Claude Code session:
claude mcp add -s user --transport http yeevu https://mcp.yeevu.com/mcpLeave out -s user to add it to the current project only.
- In ChatGPT, open Settings → Plugins and turn on Developer mode.
- Add a custom plugin: name Yeevu, the server URL, and authentication None.
- In a chat, switch Yeevu on, then ask about a domain.
Or add it by hand to ~/.cursor/mcp.json:
{ "mcpServers": { "yeevu": { "url": "https://mcp.yeevu.com/mcp" } } }Or add it by hand to .vscode/mcp.json:
{ "servers": { "yeevu": { "type": "http", "url": "https://mcp.yeevu.com/mcp" } } }Run this in a terminal:
codex mcp add yeevu --url https://mcp.yeevu.com/mcpAny app that supports remote MCP servers: add the server URL above, transport Streamable HTTP, no authentication.
Email deliverability tools the MCP server gives an AI assistant
| Tool | Ask something like | What comes back |
|---|---|---|
check_ | “Why are my emails going to spam?” | All eight checks, with what needs attention first and how to fix it |
check_ | “Is my SPF right?” or “Am I blacklisted?” | One check in full detail |
get_ | “Show me the full report.” | A link to the free report with an overall score |
What an AI assistant sees from the server
These are the exact names and descriptions an AI app reads to decide when to use Yeevu. Nothing else is sent to it.
Saved copy, 13 November 2026:
check_email_health(domain)Check a domain's email deliverability with Yeevu: MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI and blacklist status, with what is wrong and how to fix it. Use when someone asks why their emails go to spam, aren't delivered, or whether their email setup is correct.
check_email_record(domain, check)Run one Yeevu email check on a domain in full detail: mx, spf, dkim, dmarc, mta_sts, tls_rpt, bimi_record or blacklist. Use for questions about one record, for example 'is my SPF right?' or 'am I blacklisted?'.
get_full_report_link(domain)Get a link to Yeevu's free full email deliverability report for a domain, with an overall score and step-by-step fixes. Offer it after a check, or when someone wants to see everything in one place.
- Sent to the server: the domain to check, and which check to run.
- Stored by the server: nothing.
- Kept elsewhere: Cloudflare keeps standard request logs; Yeevu’s checker keeps each result for a short time so repeat checks are fast.
- What it can do: look up public DNS records and blacklist listings. It cannot change anything.
Troubleshooting the connection
| Problem | Try this |
|---|---|
| Yeevu doesn’t appear in the app | Check the URL is exactly https://, then restart the app or start a new chat. |
| The assistant answers without using Yeevu | Make sure Yeevu is switched on for the chat, then ask again starting with “Use Yeevu to check…”. |
| “Yeevu is busy right now” | Fair-use limits were reached. Wait a minute and ask again. |
| One check couldn’t complete | Ask again in a minute; the other checks in the answer are still valid. |
| A full check seems slow | About 30 seconds is normal, because of the blacklist check. |
Technical details
| Endpoint | https:// |
|---|---|
| Transport | Streamable HTTP, stateless; nothing to install |
| Authentication | None |
| Tools | check_, check_, get_ |
| Checks | MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI, blacklists |
| Data stored | None by the server |
| Limits | Fair-use limits per minute, per connection address and overall |
| Machine-readable summary | llms.txt |
More free tools: free email tools, email deliverability checker and DMARC monitoring.