mcpbeat

MailX Email Deliverability MCP Server

com.themailx/email-deliverability
answering

MailX Email Deliverability is answering right now. Last checked 4 min ago. It exposes 16 tools.

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

Uptime history 46 hours of history
46 hours agonow
100.0%
Uptime 24h
91 of 91 checks
16
Tools
read from the server
626 ms
Response time
average over 24h
open, no key
Access
streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

run in your terminal
claude mcp add email-deliverability --transport http https://themailx.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "email-deliverability": {
      "url": "https://themailx.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.email-deliverability]
url = "https://themailx.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "email-deliverability": {
      "url": "https://themailx.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "email-deliverability": {
      "url": "https://themailx.com/mcp"
    }
  }
}

Available tools 16

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

dmarc
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.
dmarc_generate
Generate a DMARC DNS record for a domain. Returns the record name, value, and type ready to be added to DNS.
imap
imap_check
Test an IMAP server connection by attempting to connect and authenticate. Use this to verify email receiving configuration.
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.
smtp
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.
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.
spf
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.
spf_generate
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.
bimi
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.
blacklist
blacklist_check
Check if a domain or IP address is listed in popular email blacklists (DNSBLs). Being blacklisted can severely impact email deliverability.
cname
cname_lookup
Look up CNAME (Canonical Name) records for a domain. Shows where a hostname aliases to.
dkim
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.
dns
dns_lookup
Look up all DNS records for a domain in one query. Returns A, AAAA, CNAME, MX, NS, TXT, and SOA records.
lookup
mx_lookup
Look up MX (Mail Exchanger) records for a domain. Returns the mail servers and their priorities.
ptr
ptr_lookup
Reverse DNS lookup. Find the hostname associated with an IP address. A valid PTR record is important for email sending reputation.
txt
txt_lookup
Look up all TXT records for a domain. TXT records contain SPF policies, domain verification tokens, DKIM keys, and other metadata.

Endpoints

URLTransportStateLatencyChecked
https://themailx.com/mcp streamable-http answering 672 ms 4 min ago

MailX Email Deliverability — questions

Answers built from our own checks of this server.

What can MailX Email Deliverability do?
It exposes 16 tools, read directly from the server on our last check. Among them: bimi_check, blacklist_check, cname_lookup, dkim_check, dmarc_check, dmarc_generate and 10 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
What is MailX Email Deliverability mostly used for?
Its tools cluster around imap, smtp and spf. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is MailX Email Deliverability working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 626 ms. The bar chart above shows every period we have measured.
How do I connect MailX Email Deliverability?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does MailX Email Deliverability need an API key?
No. MailX Email Deliverability completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 16 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is MailX Email Deliverability?
It answers our handshake in 626 ms on average, which is faster than 15% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.