# MailX Email Deliverability MCP server

Check SPF/DKIM/DMARC/BIMI, blacklists, SMTP/IMAP; DNS lookups; generate email DNS records.

## Links
- Registry page: https://www.getdrio.com/mcp/com-themailx-email-deliverability
- Website: https://themailx.com

## Install
- Endpoint: https://themailx.com/mcp
- Auth: Not captured

## Setup notes
- Remote endpoint: https://themailx.com/mcp

## Tools
- spf_check (SPF Check) - Check if a domain has a valid SPF (Sender Policy Framework) DNS record. SPF specifies which mail servers are authorized to send email on behalf of a domain. Endpoint: https://themailx.com/mcp
- dkim_check (DKIM Check) - Check if a domain has a valid DKIM (DomainKeys Identified Mail) DNS record for a given selector. DKIM allows the receiver to verify that an email was sent by the domain owner. Endpoint: https://themailx.com/mcp
- dmarc_check (DMARC Check) - Check if a domain has a valid DMARC (Domain-based Message Authentication, Reporting & Conformance) DNS record. DMARC tells receiving servers what to do with emails that fail SPF or DKIM checks. Endpoint: https://themailx.com/mcp
- bimi_check (BIMI Check) - Check if a domain has a valid BIMI (Brand Indicators for Message Identification) DNS record. BIMI allows brands to display their logo next to authenticated emails in supporting email clients. Endpoint: https://themailx.com/mcp
- dmarc_generate (DMARC Generator) - Generate a DMARC DNS record for a domain. Returns the record name, value, and type ready to be added to DNS. Endpoint: https://themailx.com/mcp
- spf_generate (SPF Generator) - Generate an SPF DNS record for a domain based on the email provider being used. Returns the record name, value, and type ready to be added to DNS. Endpoint: https://themailx.com/mcp
- smtp_check (SMTP Check) - Test an SMTP server connection by attempting to connect and authenticate. If from_email and to_email are provided, the tool may attempt to send a test email. Only provide these fields if you are authorized to send from the account and intentionally want to test full sending capability. Endpoint: https://themailx.com/mcp
- imap_check (IMAP Check) - Test an IMAP server connection by attempting to connect and authenticate. Use this to verify email receiving configuration. Endpoint: https://themailx.com/mcp
- smtp_finder (SMTP Finder) - Look up SMTP server settings (host, port, encryption) for a given email provider. Use this to find the correct SMTP configuration for services like Gmail, Outlook, SendGrid, etc. Endpoint: https://themailx.com/mcp
- imap_finder (IMAP Finder) - Look up IMAP server settings (host, port, encryption) for a given email provider. Use this to find the correct IMAP configuration for services like Gmail, Outlook, Yahoo, etc. Endpoint: https://themailx.com/mcp
- blacklist_check (Blacklist Check) - Check if a domain or IP address is listed in popular email blacklists (DNSBLs). Being blacklisted can severely impact email deliverability. Endpoint: https://themailx.com/mcp
- mx_lookup (MX Lookup) - Look up MX (Mail Exchanger) records for a domain. Returns the mail servers and their priorities. Endpoint: https://themailx.com/mcp
- txt_lookup (TXT Lookup) - Look up all TXT records for a domain. TXT records contain SPF policies, domain verification tokens, DKIM keys, and other metadata. Endpoint: https://themailx.com/mcp
- cname_lookup (CNAME Lookup) - Look up CNAME (Canonical Name) records for a domain. Shows where a hostname aliases to. Endpoint: https://themailx.com/mcp
- ptr_lookup (PTR Lookup) - Reverse DNS lookup. Find the hostname associated with an IP address. A valid PTR record is important for email sending reputation. Endpoint: https://themailx.com/mcp
- dns_lookup (DNS Lookup) - Look up all DNS records for a domain in one query. Returns A, AAAA, CNAME, MX, NS, TXT, and SOA records. Endpoint: https://themailx.com/mcp

## Resources
- mailx://skills/email-deliverability - Email Deliverability Skill Guide for diagnosing and fixing email deliverability: SPF, DKIM, DMARC, BIMI, blacklists, SMTP/IMAP. Includes audit workflow, DNS setup, and troubleshooting. MIME type: text/markdown
- mailx://skills/email-deliverability/diagnosis - Deliverability Diagnosis Reference Detailed reference for interpreting combined SPF/DKIM/DMARC/blacklist results and mapping failures to fixes per provider. MIME type: text/markdown

## Prompts
- audit-deliverability - Audit Email Deliverability Run a full deliverability audit on a domain: SPF, DMARC, DKIM, and blacklist checks. Produces a pass/fail summary with copy-pasteable fixes. Arguments: domain, dkim_selector
- setup-dns - Set Up Email Authentication DNS Generate SPF and DMARC DNS records for a domain based on its email provider, with copy-pasteable values ready to add to DNS. Arguments: domain, provider

## Metadata
- Owner: com.themailx
- Version: 1.0.0
- Runtime: Streamable Http
- Transports: HTTP
- License: Not captured
- Language: Not captured
- Stars: Not captured
- Updated: Apr 17, 2026
- Source: https://registry.modelcontextprotocol.io