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mailX

Claude connectorCommunity

Find out why your emails land in spam and get the exact fix. SPF, DKIM, DMARC, blacklist and DNS checks in one request, no account needed.

View in Claude directory

Why are my emails going to spam? Ask Claude, and mailX checks your domain live and tells you exactly what to fix.

One request runs a full deliverability audit of any domain: SPF, DKIM, DMARC, blacklists and MX, with a pass or fail for each check and the fixes in priority order. No account, no API key, no setup.

Try asking:

  • "Our emails from acme.com keep going to spam. What's wrong?"
  • "Is DKIM set up correctly for acme.com? I don't know the selector."
  • "Generate the SPF and DMARC records for acme.com. We use Google Workspace."
  • "Is our domain on a blacklist?"
  • "What SMTP settings do I use for Microsoft 365?"

What mailX checks:

  • SPF, DKIM, DMARC and BIMI, with the exact record found and how to fix it
  • Whether your domain has the SPF, DKIM and DMARC records Gmail, Yahoo and Outlook require from bulk senders
  • DKIM selector detection, so you don't need to know yours
  • Major blocklists such as Spamhaus, Barracuda and SpamCop
  • MX, TXT, CNAME, PTR and full DNS lookups
  • SPF and DMARC records ready to paste at your DNS provider, with guidance for Google Workspace, Microsoft 365, SendGrid, Mailgun, Amazon SES and more
  • SMTP and IMAP settings for common email providers

Made for founders, marketers, sales teams sending cold email, and IT admins.

Every tool is read-only: mailX reads public DNS, never changes your DNS, never sends email and never asks for passwords.

Built by Mailwarm Inc. (YC S20), an email deliverability company.

Tools
15

exposed by this connector

Movement

From our daily snapshots over the last 30 days.

Rank by popularity

#3813of 8,95312places down24h375places down7d
#3,401#3,514#3,627#3,740Oct 6Oct 12Oct 18Oct 24Oct 30Nov 4

Rank by trending score

—not ranked—24h—7d
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Popularity score

5,883+5024h07d
5,7695,8075,8455,883Oct 6Oct 12Oct 18Oct 24Oct 30Nov 4

Trending score

——24h—7d
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In its categories

How this connector compares with others in the same category. Positions are counted within the category, not across the whole directory.

Developer tools702nd of 1,608 by popularity · not ranked by trending score
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Sales and marketing945th of 2,043 by popularity · not ranked by trending score
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Communication395th of 969 by popularity · not ranked by trending score
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All 983 Communication connectors

Also on other marketplaces

Tools

  • audit_domain
  • bimi_check
  • blacklist_check
  • cname_lookup
  • dkim_check
  • dmarc_check
  • dmarc_generate
  • dns_lookup
  • imap_finder
  • mx_lookup
  • ptr_lookup
  • smtp_finder
  • spf_check
  • spf_generate
  • txt_lookup
Categories
Made by
Mailwarm Inc. · Website
Sign-in
Not required
Connector URL
https://themailx.com/mcp/claude
Transport
Streamable HTTP
Permissions
mailX only reads public information: the DNS records (SPF, DKIM, DMARC, BIMI, MX, TXT, CNAME, PTR) and public email blocklists of the domains or IPs you ask about. It has no access to your Claude conversations, inbox, files or accounts. It never changes DNS, never sends email and never asks for passwords.
Works with
Claude, Claude API, Claude Code, Claude Desktop
Added
October 14, 2026
More info
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