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Categories › Communication › Email

Domain Mail Check

MCP serverVerified domain · openkrill.appRemote● LiveFree to try

Check a domain's email DNS, whether Gmail and Outlook accept its mail, and its registration.

Install

Remote server: your requests and data go to mailcheck.openkrill.app. Claude Code: claude mcp add --transport http domain-mail-check https://mailcheck.openkrill.app/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.

  • launch_score — Use this when the user asks whether a new or secondary domain is ready for cold email or outreach, or wants a score for a sending domain, su
  • delivery_check — Use this when the user asks whether mail from a domain will reach Gmail or Outlook, or why it is rejected or goes to spam, such as "will Gma
  • check_dns_hygiene — Use this when the user asks about a domain's CAA record, DNSSEC, whether its mail servers offer STARTTLS, dangling CNAMEs or subdomain takeo
  • check_email_auth — Use this when the user asks whether a domain's email is set up correctly, such as "is DMARC set up for github.com?" or "check SPF and DKIM f
  • check_dns_records — Use this when the user asks for a domain's DNS records, its mail provider or which certificate authorities may issue for it, such as "which
  • lookup_domain_registration — Use this when the user asks who a domain is registered with or when it expires, such as "when does openai.com expire and who is the registra
  • submit_feedback — Send feedback, a bug report or a tool request to the maintainers of the tools on this server: a missing tool, missing or stale data, or a to
  • get_feedback_reply — Read the maintainers' reply to feedback you sent with submit_feedback, given its ticket id. Returns status pending until a reply is ready, t

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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