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mailX

themailx.com

mailX is a Deliverability tool that helps GTM teams land in the inbox, not in spam. Pricing: Free checks, no signup. Best fit for B2B and B2C businesses.

What it does

SPF, DKIM, DMARC, blacklist and MX checks for humans, plus an MCP endpoint for AI agents.

Why it's newProduct Hunt launch 2026Source

Visit mailX

Our verdict

Free, no signup, and your agent can run the audit. Run it on every sending domain before a campaign goes live.
Independent. Never paid.
How we review

Where it fits

mailX sits in Deliverability: land in the inbox, not in spam. Warmup, inbox placement testing, mailbox infrastructure and list verification.

Best AI Deliverability tools.

mailX FAQ

What is mailX?
mailX is a Deliverability tool for go-to-market teams. SPF, DKIM, DMARC, blacklist and MX checks for humans, plus an MCP endpoint for AI agents.
How much does mailX cost?
Free checks, no signup.
Is mailX worth it?
Our verdict: Free, no signup, and your agent can run the audit. Run it on every sending domain before a campaign goes live.
Who is mailX for?
mailX is a good fit for B2B and B2C businesses. It is listed under Deliverability, the job to land in the inbox, not in spam.
What are the best alternatives to mailX?
Other Deliverability tools in the AI GTM Stack include Mailwarm 2.0, TrulyInbox, MailReach and GlockApps. Compare all of them at https://aigtm.tools/category/deliverability.
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MailReach

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Email warmup and spam testing that builds sender reputation and checks inbox placement for cold mailboxes.

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Deliverability toolkit with inbox placement tests, DMARC analytics and IP reputation monitoring.