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MailX Email Deliverability

MCP serverVerified domain · themailx.comRemote● LiveFree to try

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

Install

Remote server: your requests and data go to themailx.com. Claude Code: claude mcp add --transport http mailx-email-deliverability https://themailx.com/mcp · Claude app: Settings → Connectors → Add custom connector.

What it can do

The tools this server listed when we connected to it, in its own words.

  • audit_domain — Use this when the user asks why their emails go to spam or wants a full deliverability check of a domain. Runs SPF, DKIM (finds the selector
  • spf_check — Use this when the user asks whether a domain's SPF record is valid, which servers may send email for a domain, or why SPF fails. Returns the
  • dkim_check — Use this when the user wants to verify DKIM for a domain. Pass the DKIM selector if known (for example google for Google Workspace, selector
  • dmarc_check — Use this when the user asks about DMARC, spoofing protection, or what happens to emails that fail authentication. Returns the live DMARC rec
  • bimi_check — Use this when the user asks about BIMI or showing a brand logo next to their emails in inboxes. Returns the live BIMI record, the logo URL i
  • dmarc_generate — Use this when the user needs a DMARC record. Returns the record name, value and type ready to publish. mailX does not publish it.
  • spf_generate — Use this when the user needs a new SPF record for their email provider. Returns a TXT record ready to publish, or explains what to set up in
  • smtp_check — Use this only when the user explicitly asks to test an SMTP login for a mail account they control and provides its credentials. Connects to
  • imap_check — Use this only when the user explicitly asks to test an IMAP login for a mailbox they control and provides its credentials. Connects to the I
  • smtp_finder — Use this when the user needs the outgoing mail (SMTP) server settings for an email provider or sending service, such as Gmail, Outlook, Micr
  • imap_finder — Use this when the user needs the incoming mail (IMAP) server settings for an email provider, such as Gmail, Outlook, Yahoo, iCloud or Zoho.
  • blacklist_check — Use this when the user suspects their domain is blacklisted or blocked. Checks the domain against major DNS blocklists and returns the resul
  • mx_lookup — Use this when the user wants to know which mail servers receive email for a domain. Returns the domain's live MX records with their prioriti
  • txt_lookup — Use this when the user wants to see a domain's TXT records, for example to find verification tokens or check what SPF or other policies are
  • cname_lookup — Use this when the user wants to know whether a hostname is an alias of another one, for example to verify DKIM or tracking CNAMEs. Returns t
  • ptr_lookup — Use this when the user wants the reverse DNS (PTR) of an IP address, for example to check a sending server's reverse DNS. Returns the hostna
  • dns_lookup — Use this when the user wants every DNS record for a domain in one view (A, AAAA, CNAME, MX, NS, TXT, SOA). Returns the live records grouped

KitScout test notes

Not tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.

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