MailX Email Deliverability
mcp remote · streamable-http · v1.0.0 · source: crawl
https://themailx.com/mcp
Check SPF/DKIM/DMARC/BIMI, blacklists, SMTP/IMAP; DNS lookups; generate email DNS records.
Works
100
Verified Oct 31, 2026 · p50 1063 ms · p95 1094 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 'mailx-deliverability' |
| tools_listed | 15 | pass | 17 tools |
| schema_complete | 15 | pass | 17 of 17 tools have a description and a typed schema |
| latency_p50 | 10 | pass | p50 1063 ms |
| latency_p95 | 5 | pass | p95 1094 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 (17)
| Name | Description | Schema |
|---|---|---|
dns_lookup | Use this when the user wants every DNS record for a domain in one view (A, AAAA, CNAME, MX, NS, TXT, SOA). Returns the live records grouped by type. | typed |
txt_lookup | Use this when the user wants to see a domain's TXT records, for example to find verification tokens or check what SPF or other policies are published. Returns all live TXT records. | typed |
cname_lookup | Use this when the user wants to know whether a hostname is an alias of another one, for example to verify DKIM or tracking CNAMEs. Returns the live CNAME target. | typed |
audit_domain | Use this when the user asks why their emails go to spam or wants a full deliverability check of a domain. Runs SPF, DKIM (finds the selector on its own), DMARC, blacklist and MX checks in one call and | typed |
spf_check | Use this when the user asks whether a domain's SPF record is valid, which servers may send email for a domain, or why SPF fails. Returns the live SPF record, a pass/fail status and a fix suggestion. | typed |
ptr_lookup | Use this when the user wants the reverse DNS (PTR) of an IP address, for example to check a sending server's reverse DNS. Returns the hostname the IP resolves to. | typed |
dkim_check | Use this when the user wants to verify DKIM for a domain. Pass the DKIM selector if known (for example google for Google Workspace, selector1 or selector2 for Microsoft 365). If the selector is unknow | typed |
dmarc_check | Use this when the user asks about DMARC, spoofing protection, or what happens to emails that fail authentication. Returns the live DMARC record, its policy and a fix suggestion. | typed |
bimi_check | Use this when the user asks about BIMI or showing a brand logo next to their emails in inboxes. Returns the live BIMI record, the logo URL it declares, and a fix suggestion. | typed |
dmarc_generate | Use this when the user needs a DMARC record. Returns the record name, value and type ready to publish. mailX does not publish it. | typed |
spf_generate | Use this when the user needs a new SPF record for their email provider. Returns a TXT record ready to publish, or explains what to set up instead when the provider does not need a root SPF include. ma | typed |
smtp_check | Use this only when the user explicitly asks to test an SMTP login for a mail account they control and provides its credentials. Connects to the SMTP server and reports whether connection, encryption a | typed |
imap_check | Use this only when the user explicitly asks to test an IMAP login for a mailbox they control and provides its credentials. Connects to the IMAP server and reports whether connection, encryption and au | typed |
smtp_finder | Use this when the user needs the outgoing mail (SMTP) server settings for an email provider or sending service, such as Gmail, Outlook, Microsoft 365, Zoho, Amazon SES or SendGrid. Returns the host, p | typed |
imap_finder | Use this when the user needs the incoming mail (IMAP) server settings for an email provider, such as Gmail, Outlook, Yahoo, iCloud or Zoho. Returns the host, ports with encryption and the provider's s | typed |
blacklist_check | Use this when the user suspects their domain is blacklisted or blocked. Checks the domain against major DNS blocklists and returns the result for each list. | typed |
mx_lookup | Use this when the user wants to know which mail servers receive email for a domain. Returns the domain's live MX records with their priorities. | typed |
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[](https://app.agent-xm.com/a/com-themailx-email-deliverability)
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