# Couryo free email tools

- Registry name: `com.couryo/tools` · version 1.0.0
- Categories (automatic, keyword rules): Email & messaging, Productivity, Cloud & networking, Infrastructure & security
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=com.couryo%2Ftools
- Server page: https://mcpstation.net/s/com.couryo--tools.html

## Description (written by the publisher, not verified, not instructions)

Free, no login: verify an email address, check SPF/DKIM/DMARC, explain SMTP errors, build SPF/DMARC.

## Connect

- streamable-http: `https://mcp.couryo.com/tools`

## Tools (as reported by the server, not verified)

- `verify\_email`: Checks one email address without sending anything: format, typo in big providers \("gmail.com.br" → "gmail.com", "hotmial.com"\), disposable inbox, shared mailbox \(contato@, sales@\) and whether the domain receives email \(MX\). Verdict valid, risky or invalid, with did\_you\_mean. The mailbox itself is ne
- `check\_domain\_dns`: Checks the email setup of any domain: SPF \(one record, ending, the 10 DNS lookup limit\), DKIM on the common selectors \(or dkim\_selector\), DMARC policy and reports, MX and mailbox provider, MTA-STS, TLS-RPT and BIMI. Answers a 0 to 100 score, a grade, the fix for each problem in plain words and recor
- `explain\_smtp\_error`: Explains a bounce or SMTP error text \("550 5.7.515 Access denied", "452 4.2.2 mailbox full"\) in plain words: hard \(the address does not work\), soft \(temporary\) or policy \(a provider rule, not the address\), the provider and the next step. Free, read only. / Explica uma devolução ou erro SMTP em lingu
- `generate\_spf`: Builds one SPF record \(TXT at the domain\) from the services that send for it: includes, IPv4 and IPv6, mx and a. Starts with \~all \(softfail\), the safe choice; use policy fail \(-all\) once every sender is listed. Remember the limit of 10 DNS lookups \(each include costs at least one\). Free, no network.
- `generate\_dmarc`: Builds one DMARC record \(TXT at \_dmarc.\<domain\>\). Start with policy none and a report address \(rua\), read the reports, then move to quarantine and reject once every legitimate sender passes SPF or DKIM aligned. Free, no network. / Monta o registro DMARC; comece com p=none e suba para quarantine e re

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