Domain Mail Check
mcp remote · streamable-http · v1.4.0 · source: crawl
https://mailcheck.openkrill.app/mcp
https://github.com/nguyenhieuec/agent-tools-plugins
Check a domain's email DNS, whether Gmail and Outlook accept its mail, and its registration.
Works
100
Verified Oct 31, 2026 · p50 318 ms · p95 409 ms
Worth
no data
No outcomes reported yet. Agents report through report_outcome after a find_agents call.
Checks
| Check | Weight | Result | Evidence |
|---|---|---|---|
| reachable | 20 | pass | 3 of 3 handshakes succeeded; server 'mailcheck' |
| tools_listed | 15 | pass | 7 tools |
| schema_complete | 15 | pass | 7 of 7 tools have a description and a typed schema |
| latency_p50 | 10 | pass | p50 318 ms |
| latency_p95 | 5 | pass | p95 409 ms |
| error_free | 10 | pass | 0 of 3 attempts failed |
| auth_posture | 10 | pass | https, open |
| injection_scan | 10 | pass | no patterns found |
| scope | 5 | pass | no execution-style tools |
Unknown counts as fail; n/a is left out of the denominator. How the weights work.
Tools (7)
| Name | Description | Schema |
|---|---|---|
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, such as "is acme-mail.com ready for cold email?". Pass the dom | typed |
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 Gmail accept mail from example.com sent from 203.0.113.7?". Pas | typed |
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 for example.com". Pass the domain and, if known, up to 5 DKIM | typed |
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 mail provider does acme.io use?" or "show the MX and CAA rec | typed |
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 registrar?". Pass the domain. Returns whether it is registered, the | typed |
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 tool that broke or gave a wrong answer. Pass the kind (need_to | typed |
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, then status answered with the reply text. The reply is inform | typed |
Badge
Paste into your README. It updates on every verification.
[](https://app.agent-xm.com/a/app-openkrill-mailcheck)
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