mailX by mailwarm - Email deliverability toolkit for humans and AI agents

Your emails go to spam. mailX shows you why, and how to fix it in seconds with clear answers and exact steps. Built for humans and AI agents. API and MCP ready.

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Bravo !!! Is mailX for a more beginner audience while Mailwarm is more for advanced/expert audience or are they complementary?

     MailX and Mailwarm are complementary. MailX is Free, with no sign up and help you set the technical part, we made it AI agent ready so it's easy for anyone to setup. Mailwarm is to warm up your inbox after, so your emails actually land in inbox and not spam. So you can see MailX as the first step (setup right your SPF, DKIM, DMARC...) and Mailwarm as the second step (build the reputation of your inbox so it's trusted). Both tools work for everyone, beginner or expert, just different jobs 🙏

 Thank you! They’re definitely more complementary than overlapping.

Mailwarm focuses on email warmup and sender reputation, while mailX is more about diagnosing, understanding, and fixing deliverability issues across the whole setup.

There’s also a usability difference: mailX is designed to make deliverability much more accessible to non-experts and AI agents, while still being useful for more advanced senders too.

     They are complementary.

helps you diagnose what’s wrong and what to fix.
helps you build sender reputation and improve inbox placement over time.

Simple way to see it: mailX tells you the problem, Mailwarm helps you improve the reputation layer.

Congrats on the launch Othman

 Thanks

i like the focus on explaining what is wrong instead of just showing technical metrics 👀 Most founders are not email infrastructure experts.

 Exactly. Founders don’t need more raw metrics. They need to know what is broken, why it matters, and what to fix first.

 Exactly! people can see SPF/DKIM/DMARC records or deliverability metrics, but translating that into what’s actually broken and what should I do next? is the hard part.

That’s the gap we’re trying to close with mailX :))

 Got it right!!!

 We want mailX to show the result and score, explain it, and give steps on how to fix your email deliverability

Interesting angle making deliverability usable by AI agents, not only operators. For teams that use email as a growth channel, the risk is an agent sending more volume before the domain is healthy. Does mailX expose a clear do-not-send-yet, safe-to-scale, or fix-these-first status through the API or MCP, so an agent can slow down instead of just reporting a score?

 Yes, that’s exactly the behavior we want. Today, mailX gives the agent the diagnostic layer: what’s broken, why it matters, and what to fix first. The next step is turning that into clearer action states like “fix this first” or “safe to scale”, so agents can slow down before damaging the domain.

 MailX Agent are mainly here to check if you apply your protocols properly they will not send on your behalf. We will give you the health check so your other agent can take decisions

  That separation makes sense. A diagnostic health-check layer is safer than letting an agent send blindly. The useful next step would be a simple action state that another agent can read: pause sending, fix protocol issues, or safe to scale.

This actually can reduce a lot of time, especially for buessniss owners and people interacting a lot with Emails. Myself, I get hunderends if not thousands of emails each day. mailX will help a lot.

 That’s exactly the kind of workflow mailX is for 🙌
When your inbox volume gets that high, even saving a few seconds per email adds up fast.

 Thanks God, AI agents will save us from inbox anxiety!

 That has always been our goal 😉

 Totally agree, this becomes a huge time saver, especially for business owners or anyone buried in emails. When you’re getting hundreds or even thousands a day, something like mailX can make a real difference.

 Absolutely. Email-heavy teams feel the pain very fast. When you deal with hundreds or thousands of emails, even small deliverability issues create a lot of wasted time.

That’s exactly why we want mailX to make diagnosis faster and clearer.

Hey Product Hunt 👋

After spending years around email deliverability from the technical side, one thing still surprises me: very small details can have a real business impact. A missing DNS record, a weak setup, or one bad configuration can quietly affect whether emails reach the inbox or not.

With more teams adding automation and AI agents into their workflows, this matters even more. Agents can send emails, trigger workflows, and move fast. But they also need clear signals when something is wrong, otherwise they can scale issues without anyone noticing.

That’s what mailX solves: making deliverability easier to understand, not only for humans, but also for AI agents that need structured, actionable answers.

Happy to answer any technical questions with the team today.

I do really like the idea of giving AI agents a deliverability expert, because otherwise they might just send blindly. Something I'm curious about is how an agent would actually use mailX in practice?

 Really good question. Maybe agents will eventually need deliverability-awareness built into their workflows, because otherwise they’ll just optimize for volume and unintentionally damage sender reputation over time. The goal with mailX is helping agents monitor domain health, detect issues early, and adapt instead of sending blindly.But yeah I appreciate your question :))

 Good question. In practice the agent calls the MailX MCP before it sends, basically as a pre-flight check. It pulls SPF, DKIM, DMARC, blacklist status, MX for the sending domain, and gets back a verdict it can act on: send, hold, or fix first.


If something's broken (say DMARC is set to none), the agent can call the SPF/DMARC generator tool to produce the corrected record, hand it back to the user, then re-check on the next run.


The shift is from blind 'spray and pray' to an agent that knows before it sends whether the email has a chance of landing.

 In practice, mailX is the diagnostic layer the agent calls before sending or scaling.

It can check the setup, spot risks, and tell the agent: “safe to continue” or “fix this first.”

That’s the direction we believe AI outbound needs.

 In practice, mailX becomes the diagnostic layer the agent calls before sending or scaling. The agent can check the domain setup, authentication, blacklists, and risks, then decide: “safe to send” or “fix this first.” Today it’s diagnostic. The next step is remediation with human approval.

 If your agent have access to your outreach and DNS, he can actually use mailX to double check everything, switch between domains is one of them is unhealthy. Stop if there is a problem, and tell you if someone is trying to send emails on your behalf using DMARC.

💡 Bright idea

Love the 'no guesswork' approach. We check our SPF/DKIM/DMARC manually every month but the inbox placement algorithms change so fast it’s hard to keep up. Does mailX give real-time feedback on spam trigger words in the actual copy too?

Hey Thami! it sounds awesome. Mailing is a hard field but key at the same time. I'm sure you'll rock it! All the best

 Exactly, email is one of those fields that looks simple from outside, but becomes very deep when you start scaling. Appreciate the support!

 Thanks for the support

 Thank you so much. Email looks simple until you start scaling. That’s why we’re trying to make deliverability easier to understand and fix. Appreciate the support!

The MCP angle is what makes this interesting to me.
I've been building with Claude agents and "agent sends email" workflows always have the same silent failure mode: it lands in spam, the agent reports success, and the user only finds out a week later when no one replied.
Diagnosing deliverability before the send (and exposing it as a tool the agent can actually call) is the right shape.

Curious, does the MCP server return structured remediation steps the agent can execute, or is it diagnostic-only for now?

Congrats on the launch !!

 This is exactly the failure mode we’ve been thinking about. The agent reports emails were sent successfully, but from a deliverability perspective the operation may have completely failed.

And yes the direction is definitely toward structured remediation, not just diagnostics. We want agents to understand what's the issue and why it happened and what do next to fix it.

That’s where the MCP side becomes really interesting for us.

 Thanks you, what are you building next?

 Exactly, that silent failure mode is the worst part of agentic email.

 It actually diagnose and give recos

 That silent failure is the problem: the agent says “sent”, but nobody knows if the email had a real chance to land. For now, MCP is mainly diagnostic.

Next step is structured remediation: actions an agent can suggest, prepare, and execute with human approval.

We don’t want agents changing DNS blindly. But they should know when to say: “don’t send yet, fix this first.”