What is a DNS lookup and what is it used for?

A DNS lookup queries the Domain Name System to translate human-readable domain names into underlying records like IP addresses or mail servers. It is primarily used to troubleshoot domain configuration, verify email routing paths, and confirm underlying server connectivity.

Why are my emails going to spam?

Emails typically go to spam due to technical authentication issues like missing or misconfigured SPF, DKIM, or DMARC records, global blacklist listings, low user engagement, or poor sender/IP reputation.

What makes mailX different from traditional tools like MXToolbox?

Unlike traditional setups, mailX combines multiple individual audits (SPF, DKIM, DMARC, MX, and blacklists) into a single unified report. It also features clear plain-English explanations alongside an engineered native MCP server and JSON API built directly for AI agent integrations.

mailX: Email deliverability toolkit and live DNS checker for humans and AI agents.

Name: mailX
Rating: 5 (55 reviews)
Author: toolify

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Introduction:

Email deliverability toolkit and live DNS checker for humans and AI agents.

Added on:

Jun 03 2026

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7.1K

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mailX Product Information

What is mailX?

mailX is a comprehensive email deliverability toolkit and DNS lookup platform designed to identify why emails go to spam and provide actionable steps to fix them. Built for both human professionals and AI agents, it features live DNS interrogation tools alongside email authentication checkers for SPF, DKIM, DMARC, and BIMI. The platform diagnoses server configurations, checks real-time domain blacklist statuses, and evaluates SMTP and IMAP setups to optimize inbox placement. Additionally, it features native integrations for developers, offering an MCP server implementation and a clean JSON API to streamline diagnostic workflows within automated multi-agent ecosystems.

How to use mailX?

To use mailX, enter your domain name or IP address into the main analysis input on the homepage to launch a full deliverability and live DNS audit. The tool instantly runs automated checks against live records and returns a plain-English diagnostic report identifying domain reputation issues, technical misconfigurations, or authentication errors. Review the actionable, exact steps provided in the report to update your DNS records or mail server architecture and resolve your spam placement issues.