ChatGPT Plugin

mailX

Find why your emails hit spam

Brand: mailX

Category: Developer Tools
Primary Subcategory: Email Deliverability & Validation

Integration details

Description

mailX finds out why your emails land in spam or junk, using live DNS checks, and tells you exactly what to fix. Ask in plain English, for example "why are my emails going to spam?", "does my domain have the SPF, DKIM and DMARC that Gmail and Yahoo require for bulk senders?" or "check DMARC for acme.com". mailX runs the checks in real time: - Full email deliverability audit in one step: SPF, DKIM, DMARC, blacklists and MX, with the fixes to apply in priority order - SPF, DKIM, DMARC and BIMI validation, with the exact record found and what it means - DKIM selector detection, so you don't need to know your selector - Blacklist lookup for a domain across major DNS blocklists such as Spamhaus, Barracuda and SpamCop - MX, TXT, CNAME, PTR and full DNS lookups - SPF and DMARC record generation for Google Workspace, Microsoft 365 and other providers, ready to paste into your DNS provider - SMTP and IMAP server settings for Gmail, Outlook, Microsoft 365, Zoho and other providers Useful when you set up a new domain, move to Google Workspace or Microsoft 365, launch a newsletter or an outreach campaign, or see emails going to spam in Gmail or Outlook. Every result comes from a live DNS query, so you see the state of your domain right now. No account or setup needed. mailX only reads public DNS data. It never changes your DNS, never sends email and never asks for passwords. Built by Mailwarm Inc. (YC S20), an email deliverability company.

Integration type: Plugin
Verification status: Not applicable
Platform: ChatGPT
Category: Developer Tools
Primary Subcategory: Email Deliverability & Validation
Secondary Subcategories: None listed
Brand: mailX
Access: No account required
First tracked: 2026-10-20
Tool count: 15
Market: US

Agent DiscoverabilityChatGPT Discoverability ScoreUpdated daily

The first to track the ChatGPT, Claude, Muse, Grok & Google ecosystems, with the largest database on the core platforms. Tracked daily since 1 December 2025.

mailXChatGPT Plugin · Email Deliverability & Validation

Discoverability Score

0/100

Invisible

Category rank

#10of 13

in Email Deliverability & Validation

Picked: 0.0/100
Found: 0.0/100
Positioned: –/100

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Category leaderboard

Email Deliverability & Validation

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Primary Subcategory

Competing in ChatGPT Email Deliverability & Validation

View Category

Listed in alphabetical order

Primary Subcategory

CleanMyList0/100

ClearBounce0/100

Easy Email Verification0/100

Email Spam Tester0/100

Inbox Monster0/100

mailX0/100

Tools

15 tools agents can invoke

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 returns pass, warning or fail for each, an overall result, and the fixes to apply in priority order with help links. Takes about 10 seconds. mailX never changes DNS.
audit_domain
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.
bimi_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.
blacklist_check
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.
cname_lookup
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 unknown, omit it: mailX then tries common selectors and returns the ones it finds. Returns the published key and its status. A miss on common selectors does not prove DKIM is absent.
dkim_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.
dmarc_check
Use this when the user needs a DMARC record. Returns the record name, value and type ready to publish. mailX does not publish it.
dmarc_generate
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.
dns_lookup
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 setup guide. Never asks for the user's credentials.
imap_finder
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.
mx_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.
ptr_lookup
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, ports with encryption, what to use to log in, and the provider's setup guide. Never asks for the user's credentials.
smtp_finder
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.
spf_check
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. mailX does not publish it.
spf_generate
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.
txt_lookup

FAQs

mailX ChatGPT Plugin FAQ

How the directory, categories and Discoverability Score work.

Read the methodology

How do I improve mailX's ChatGPT Plugin discoverability?

The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.

What are mailX alternatives on ChatGPT?

As of 2026-11-02, mailX competes with CleanMyList, ClearBounce, Easy Email Verification, Email Spam Tester, Inbox Monster, InboxTrue, Mailinite Outbound Readiness, MailRambo and 4 more in ChatGPT Email Deliverability & Validation, ranked by public Discoverability Score.

Where does mailX rank in Email Deliverability & Validation on ChatGPT?

As of 2026-11-02, mailX ranks #10 of 13 in ChatGPT Email Deliverability & Validation with a Discoverability Score of 0/100 (Invisible).

Where is this profile measured?

This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.

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Competing in ChatGPT Email Deliverability & Validation

15 tools agents can invoke

mailX ChatGPT Plugin FAQ