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Scan.mx

Scans a domain's mail servers, SPF, DKIM and DMARC records, DNSSEC and blocklist status, then assigns a letter grade.

Actively maintained

At a glanceswept Oct 26, 2026

not read yet

Use

For
Domain owners and email admins checking whether their domain's email authentication and DNS setup is sound
Activity
Actively maintainedsite updated yesterday
Runs as
API
Used for
  • Check SPF, DKIM and DMARC records for a domain
  • Find blacklist listings for a domain's mail servers
  • Confirm mail servers accept mail and support STARTTLS
Worth knowingcomputed from what we read · each with its source
  • Has an MCP server (1 in the registry)public registry →
  • Publishes llms.txt, a file written for AI assistantsscan.mx ↗
How a program reaches itfound, not claimed · read Oct 26, 2026

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Developer toolsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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Three tools from the Atlas for the job you describe, each with what fits and what does not.

From people who use itnot part of the reading

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Questions this page answers
  • What is Scan.mx?

    Scans a domain's mail servers, SPF, DKIM and DMARC records, DNSSEC and blocklist status, then assigns a letter grade. It is listed in the Atlas under Developer tools.

  • Who is Scan.mx for?

    Domain owners and email admins checking whether their domain's email authentication and DNS setup is sound

  • Do people use Scan.mx?

    Little sign of use.

  • Is Scan.mx still maintained?

    Actively maintained: site updated yesterday.

  • What are alternatives to Scan.mx?

    In Developer tools, by use: Verifox AI, UptyBots, SenderSignal, FirmLedger, Upcheck, Httpstatus.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk