mailX by mailwarm
Claim this toolInstantly diagnose and fix email deliverability issues with comprehensive DNS and email authentication checks.
Free, no paid tier Visit WebsiteReviews on G2 SourceForge
18 reviews tracked The Bottom Line
- Price
- Free, no paid tier. Compare plans
Key facts
- Diagnoses email deliverability issues with live DNS and authentication checks.
- Provides clear explanations and actionable fixes for spam placement problems.
- Offers tools for humans and AI agents, including API and MCP access.
Pros
- Completely free with no signup required.
- Provides instant results from live DNS.
- Offers clear, plain-English explanations and actionable fixes.
- Supports both human users and AI assistants with API/MCP access.
- No user data is stored, ensuring privacy.
Cons
- No direct email sending or warming functionality (requires other Mailwarm products).
- Focuses solely on diagnostics, not ongoing monitoring or automated fixes (requires MailAdept).
What is mailX by mailwarm?
mailX by Mailwarm is a comprehensive email deliverability toolkit designed for both humans and AI agents. It helps users understand why their emails are going to spam and provides actionable steps to fix these issues. The platform offers a suite of tools for DNS lookups, email authentication checks (SPF, DKIM, DMARC, BIMI), mail server tests, and blacklist checks, all running against live DNS in real time.
This tool is ideal for founders, sales teams, marketing teams, agencies, and developers who rely on email performance. It provides clear, plain-English explanations of technical issues and specific fixes, eliminating the need for deep technical expertise. mailX distinguishes itself by offering combined audits, API and MCP access for AI agents, and a focus on actionable insights rather than just raw data. It's part of the Mailwarm ecosystem, which aims to simplify email deliverability diagnostics and maintenance.
mailX helps users verify domain configurations, detect DNS issues, prevent spoofing, improve inbox placement, and identify if their domain or IP is listed on spam databases. By providing fast diagnostics and clear recommendations, it ensures that emails reach the intended inbox, protecting sender reputation and improving overall email campaign effectiveness.
Available on: Web
Ratings Across the Web
4.2 (18 reviews)
mailX by mailwarm holds an aggregate rating of 4.2 out of 5 from 18 reviews across G2 and SourceForge, last checked May 29, 2026.
Ratings aggregated from independent review platforms. Learn more
Key Features
- Live DNS Lookup Tools (A, MX, TXT, CNAME, PTR)
- Email Authentication Checkers (SPF, DKIM, DMARC, BIMI)
- Blacklist Checker (RBL / DNSBL)
- Mail Server Tests (SMTP, IMAP)
- DMARC, SPF, DKIM Generators
- API & MCP access for AI agents
Pricing
Free
mailX by mailwarm is completely free to use with no hidden costs.
Reviews
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4.2/5
Across 18 verified user reviews on G2, SourceForge
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mailX by mailwarm FAQ
How does mailX help improve email campaign effectiveness?
mailX helps improve email campaign effectiveness by diagnosing and fixing email deliverability issues. It provides actionable steps to prevent emails from going to spam, ensuring they reach the intended inbox and protecting sender reputation.
Which teams benefit most from using mailX?
Founders, sales teams, marketing teams, agencies, and developers who rely on email performance benefit most from mailX. It helps these teams verify domain configurations, detect DNS issues, and improve inbox placement without requiring deep technical expertise.
How does mailX compare to SendGrid for email deliverability?
mailX focuses on diagnosing and fixing email deliverability issues with comprehensive DNS and email authentication checks, providing actionable insights. SendGrid, conversely, is an email service provider primarily focused on sending emails, not solely on diagnostic analysis.
What kind of limitations should users be aware of with mailX?
mailX focuses solely on diagnostics and does not include direct email sending or warming functionality. It also does not provide ongoing monitoring or automated fixes, which are features found in other Mailwarm products like MailAdept.
Does mailX include a free tier?
mailX is completely free to use, with no signup required and no paid plan necessary. It provides instant results from live DNS without any cost.
Can AI agents utilize mailX for email diagnostics?
Yes, mailX is designed to support both human users and AI agents. It offers API and MCP access, allowing AI assistants to integrate and leverage its comprehensive diagnostic capabilities for email authentication and DNS checks.
How does mailX ensure user data privacy?
mailX ensures user data privacy by not storing any user data. All diagnostic checks run against live DNS in real time, and the platform is designed to provide results without retaining personal or usage information.
Source: themailx.com