About Domain Mail Check
Domain Mail Check is an MCP server for people assessing a domain’s email setup and delivery. It checks email DNS, whether Gmail and Outlook accept its mail, and the domain’s registration status.
Key features
- 01Check domain email DNS
- 02Check Gmail and Outlook acceptance
- 03View domain registration status
Use cases
- 01Investigate domain email delivery issues
- 02Check whether Gmail and Outlook accept domain mail
- 03Check whether a domain is registered
MCP support
It exposes domain mail-checking tools to MCP clients at `https://mailcheck.openkrill.app/mcp`. The server is public, read-only, and requires no key.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://mailcheck.openkrill.app/mcpclaude mcp add --transport http app-openkrill-mailcheck https://mailcheck.openkrill.app/mcp{"mcpServers":{"app-openkrill-mailcheck":{"type":"http","url":"https://mailcheck.openkrill.app/mcp"}}}Open in Cursor{"servers":{"app-openkrill-mailcheck":{"type":"http","url":"https://mailcheck.openkrill.app/mcp"}}}Open in VS Code{"mcpServers":{"app-openkrill-mailcheck":{"type":"http","url":"https://mailcheck.openkrill.app/mcp"}}}{"mcpServers":{"app-openkrill-mailcheck":{"serverUrl":"https://mailcheck.openkrill.app/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
7| Parameter | Type | Required | Description |
|---|---|---|---|
| domain | string | Yes | The domain you will send cold email from, such as "acme-mail.com". A web address or an email address is reduced to its domain. |
| dkim_selectors | array | No | DKIM selector names, the s= value in a DKIM-Signature header, such as ["google"]. Optional: when omitted, 10 usual selector names are tried. At most 5. |
Details
From the project READMESite, SEO and Email Checks
Audit a site's SEO and AI crawler access, read a web page as clean Markdown, check a domain's mail delivery, see if a name's domain is free, and report email engagement.
claude plugin install web-email@openkrill
| Skill and MCP server | Tool | Endpoint |
|---|---|---|
site-check | Site SEO & AI Crawler Audit | https://sitecheck.openkrill.app/mcp |
seo-audit | SEO Audit | https://seoaudit.openkrill.app/mcp |
answer-share | Namequota | https://answershare.openkrill.app/mcp |
page-fetch | Page Fetch | https://pagefetch.openkrill.app/mcp |
mailcheck | Domain Mail Check | https://mailcheck.openkrill.app/mcp |
names | Startup Name Check | https://names.openkrill.app/mcp |
emailpld | Email Engagement Report | https://emailpld.openkrill.app/mcp |
Every server is public, read-only and needs no key. Generated from the Agent Tools plugin listings; edits made here are overwritten.
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