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mailX by mailwarm Review

mailX by mailwarm is an email deliverability and DNS analysis toolkit that provides free email deliverability tests, DNS lookups, and IP lookups to analyze domain configurations.

shipped May 25, 2026aifreemium
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mailX by mailwarm - AI tool for mailx mailwarm. Professional illustration showing core functionality and features.

Why it matters

1Offers a 100% free email deliverability test and DNS analysis toolkit, requiring no signup.
2Features an API and Model Context Protocol (MCP) server for programmatic integration by AI agents and custom software.
3Provides instant domain analysis, including checks for MX records, SPF, DKIM, DMARC, and blacklist status.
4Scans domains or IP addresses against over 100 spam blacklists (DNSBLs/RBLs).

Stork’s verdict on mailX by mailwarm

mailX offers fast, comprehensive email infrastructure diagnostics, but its programmatic focus might be overkill for simple manual checks.

mailX by mailwarm reviewed by Stork AI · stork.ai/en/mailx-by-mailwarm

About mailX by mailwarm

Platforms
Web
Target Audience
Individuals and businesses needing email deliverability and DNS tools.

Specs

API Docs

View Documentation →

API Available

Yes, public API

overview

What is mailX by mailwarm?

mailX by mailwarm is an email deliverability and DNS analysis tool developed by mailwarm that enables marketers, developers, and AI agents to diagnose and fix email deliverability issues. It provides a suite of tools for analyzing and optimizing email infrastructure and domain configurations. The platform's core function is to identify specific reasons why emails may not be reaching the primary inbox, offering actionable fixes. It was launched on Product Hunt on May 20, 2026, and is designed for both human users and AI agents, featuring an API and Model Context Protocol (MCP) server for programmatic access.

features

Key Features of mailX by mailwarm

mailX by mailwarm provides a comprehensive set of tools for email deliverability and DNS analysis, designed to offer detailed insights and actionable recommendations.

  • Email deliverability test: Conducts a complete audit of email infrastructure in under 10 seconds.
  • DNS lookup: Verifies various DNS records including A, MX, TXT, CNAME, and PTR.
  • IP lookup: Analyzes IP address reputation and associated records.
  • MX records checker: Confirms correct mail exchange record configuration.
  • SPF, DKIM, DMARC checker: Validates email authentication records to prevent spoofing and improve deliverability.
  • Blacklist status check: Scans domains and IP addresses against over 100 spam blacklists (DNSBLs/RBLs).
  • SMTP server analysis: Tests SMTP server connectivity, configuration, and response times.
  • Generate DNS records: Assists users in creating correct SPF and DMARC records.
  • Test SMTP/IMAP server connectivity: Verifies mail server accessibility and functionality.

use cases

Who Should Use mailX by mailwarm?

mailX by mailwarm is designed for a diverse range of users who require robust email deliverability and DNS analysis capabilities, from individual marketers to AI agent developers.

  • Marketers: For pre-campaign audits, monitoring email deliverability health for CRM flows, and troubleshooting low reply rates in cold email campaigns.
  • Developers and IT Operations: For domain and mail server infrastructure management, verifying DNS configurations, and integrating programmatic email diagnostics via API.
  • AI Agents: For automated, programmatic deliverability checks and authentication record generation through its Model Context Protocol (MCP) server and JSON API.
  • Individuals and Businesses: For diagnosing and fixing email deliverability issues, analyzing domain configuration, and checking email authentication to prevent spoofing.

pricing

mailX by mailwarm Pricing & Plans

mailX by mailwarm operates on a freemium model. As of May 2026, the service is advertised as 100% free, requiring no signup for its core functionalities. This includes instant access to email deliverability tests, DNS lookups, IP lookups, and comprehensive checks for MX records, SPF, DKIM, DMARC, and blacklist status. While currently free, the 'freemium' designation suggests potential future premium features or usage-based tiers for advanced functionalities or higher usage limits.

  • Free Tier: 100% free, no signup required, includes all core features for email deliverability and DNS analysis.

Similar Tools

mailX by mailwarm vs Competitors

mailX by mailwarm differentiates itself in the email deliverability and DNS analysis market through its API-first design, Model Context Protocol (MCP) readiness for AI agents, and its focus on providing actionable, synthesized analysis rather than raw data.

1
MxToolbox↗

MxToolbox offers a comprehensive suite of free diagnostic tools for DNS, email, and network issues, making it a go-to for IT professionals.

Similar to mailX, MxToolbox provides extensive free tools for MX, SPF, DKIM, DMARC, and blacklist checks, but it also extends to broader network diagnostics. Both offer free tiers for essential checks, targeting users needing quick, detailed domain and email health assessments.

2
MailGenius↗

MailGenius provides a unique spam score analysis and inbox placement previews across major email providers to help optimize email content before sending.

While mailX focuses on domain and IP health, MailGenius adds a layer of content-based deliverability testing and spam scoring. Both offer free checks, but MailGenius is more geared towards marketers optimizing email campaign performance.

3
EasyDMARC↗

EasyDMARC specializes in DMARC implementation and monitoring, offering advanced tools for validating and optimizing DMARC, SPF, and DKIM records.

EasyDMARC provides a deeper focus on DMARC, SPF, and DKIM record management and reporting compared to mailX's broader deliverability test. Both offer free checkers for these authentication protocols, but EasyDMARC extends to comprehensive DMARC policy management.

4
ZeroBounce↗

ZeroBounce is primarily known for its highly accurate email validation service, which helps maintain clean email lists and improve overall deliverability.

While mailX focuses on domain and IP infrastructure, ZeroBounce's core strength is email list hygiene, though it also offers free blacklist and DMARC checks. Both have freemium models, with ZeroBounce's free tier often tied to a number of email validations.

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