A free toolkit that diagnoses and fixes email deliverability issues.
Product memo
MailX serves as a human-readable toolkit for diagnosing why emails go to spam. It offers a broad suite of free DNS and email deliverability tools, differentiating itself with plain-English explanations and actionable fixes, catering to both human users and AI agents via an MCP API.
For who
Marketers, developers, and founders relying on email
Solves what
Diagnoses and fixes email deliverability issues and spam placement.
- Email deliverability testing
- DNS record analysis
- Authentication checks (SPF, DKIM, DMARC)
In their own words
Email deliverability toolkit for humans and AI agents
Your emails go to spam. mailX shows you why and how to fix it in seconds.
Commercial cues
Model
free only
Free tier
Yes
Trial
No
Pricing Strategy
A completely free, no-signup product positioned as a broad toolkit for email deliverability and DNS diagnostics.
- • Offers generators for common DNS records to aid setup
- • API access for AI agents targets advanced users
Operator context
Operating setup
Founded
May 2026
Platform
Web app
Audience
Developers
Market demand
mailX by mailwarm keyword demand
5 keywords
Market demand is Starter-tier market intelligence.
Derived from this product’s latest SimilarWeb keyword mix — directional demand, not proof.
Builder Strategy
- Strategy Type
- Niche Specialist
- Stage
- Vc Growth
- Effort
- Solo Buildable
About mailX by mailwarm Expand
A free toolkit that diagnoses and fixes email deliverability issues.