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mailX by mailwarm - Instant deliverability diagnostics for AI agents & humans.

mailX tells you why emails go to spam and how to fix it, via web, API, and MCP.

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YC · launched May 18, 2026 · 35 upvotes (top 25%) · 1 view

Niche: email marketing and deliverability tools · 107 launches, 6 in the last 7 days ▼ -40% · Explore this niche →

Category and tags
  • Marketing
  • Analytics & BI
  • B2B
  • AI feature
  • Commercial product
  • SaaS
  • B2B
  • Marketing
  • Email

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More like this: all 107 launches in email marketing and deliverability tools →

Could you build this?

Yes Deliverability diagnostics involve analyzing SPF, DKIM, DMARC, IP blacklists, and email headers via standard DNS checks and SMTP probing, exposed through an API and UI.

Competitors

Other products that read as similar to this one : 207 launches clear the similarity bar, closest 8 shown.

Attention rank: #63 of 208 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 192 days after the earliest competitor.

  • mailX by mailwarm · ph · 2026-05-20 · 597 upvotes · similarity 0.87
  • Mailwarm 2.0 · ph · 2026-06-04 · 680 upvotes · similarity 0.63
  • MailAdept by mailwarm · ph · 2026-07-01 · 287 upvotes · similarity 0.56
  • EmailWarmup · ph · 2026-09-15 · 1 upvotes · similarity 0.53
  • Gxmail · ph · 2026-11-13 · 1 upvotes · similarity 0.49
  • Atomic Mail Agentic · ph · 2026-06-21 · 268 upvotes · similarity 0.46
  • WatchFox · ph · 2026-10-14 · 2 upvotes · similarity 0.46
  • Domailfix · ph · 2026-11-02 · 2 upvotes · similarity 0.45

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.