Mailwarm increases your email deliverability by raising your sender reputation. It warms up, increases the positive actions & keep your email activity flat. Emails are sent from your account to Mailwarm: they're put out of spam, opened, starred & replied.
This is the 2nd launch from Mailwarm. View more
Mailwarm 2.0 (YC S20)
Most founders rely on email to grow, but emails don’t land in the inbox by magic. Mailwarm 2.0 is the premium email warmup and deliverability system built to give your emails the best chance of reaching the inbox. It combines automated warmup, real engagement, monitoring, infrastructure checks, and experts call available for every subscriber.
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Launch Team
Mailwarm
Like most founders, email has been our #1 sales channel since our first startup in Paris.
That’s what led us to build mailwarm and work on email deliverability since 2020.
And one thing became clear very early: your emails don’t land in the inbox by magic.
Back in 2020, we launched Mailwarm here on Product Hunt as one of the first email warmup tools.
It became #1 Product of the Day 🏆 and since then, we’ve helped 10,000+ founders, sales teams, agencies, and businesses improve sender reputation and avoid the spam folder.
But over the years, we learned something important: Basic warmup is not enough anymore.
Teams need real engagement signals, monitoring, infrastructure checks, and sometimes a real deliverability expert to understand what’s happening and what to fix.
That’s why we built Mailwarm 2.0.
Not just the original email warmup tool. A premium email warmup and deliverability system built to give your emails the best chance of reaching the inbox.
If email is part of your growth, tell me in the comments how you’re using it. We’ll take a look and help you improve your inbox placement.
mailX by mailwarm
Bonjour Product Hunt 👋
I spent the last 15 years in digital marketing, and a big chunk of that running email at scale at one point, sending over 1.5 million emails a day as an affiliate across more than 30 brands. When you want to operate at that volume, you learn one lesson fast: sender reputation isn't something you set up once. It's something you build, every day, with behavior. And if you don't, perfect DNS, perfect copy, perfect lists won't save you.
That's the gap most teams hit. They configure SPF/DKIM/DMARC, write great emails, build clean lists, and still land in spam. Because reputation isn't a configuration. It's a pattern of activity that inbox providers learn to trust over time. New domains have none of it. Quiet domains lose it. Aggressive senders blow through it.
Mailwarm is what we built to solve that, alongside @bengeekly and @thamibenjelloun. Today is a big one for us; we're launching Mailwarm v2, with real-time reputation monitoring, a smarter warm-up per ESP engine, content warm-up, and more. It's the biggest update we've shipped since launch.
If you have poor email performance, drop your situation in the comments, and I'll dig in.
Excited to launch today 🚀
mailX by mailwarm
Hey Product Hunt community 👋
I spent 8 years in roles where I was sending endless follow-up emails, onboarding messages, CRM emails, and customer reminders.
I even worked at a CRM SaaS where I would help users with email-related issues without fully understanding what was happening behind the scenes. Whenever an email disappeared, the advice was often: “Can you check your spam folder?” or “Maybe it’s a DNS issue?”
Working on Mailwarm made me realize how much is actually happening before an email reaches the inbox.
I learned that hitting “send” is only the visible part. Behind every email, there is sender reputation, engagement, domain setup, sending behavior, inbox placement, and a lot of small signals that can decide whether your email lands in the inbox or not.
We wanted to help teams warm up their inboxes properly, build better sender reputation, monitor what’s happening, and get real guidance when something starts going wrong.
Because most founders, sales teams, and marketers don’t want to become deliverability experts. They just want their emails to reach the inbox and know what to fix when they don’t.
The team and I are live today, happy to answer your questions and hear how you’re handling deliverability 🚀
mailX by mailwarm
Hi Product Hunt Community!
I’m Naim, and I handle the technical account management side of things at Mailwarm. If there’s one thing I’ve learned the hard way, it’s this: when your emails start hitting spam, it’s almost never for just one reason.
It’s a ghost in the machine. Maybe a DNS record is slightly off. Maybe a sudden spike in sending volume triggered a filter. Or worse ... your domain reputation has been quietly tanking for weeks, and you only notice when your reply rates hit zero. It is incredibly painful to waste days tweaking random settings in the dark, hoping something works.
That frustration right there is why Mailwarm was built.
The goal is to turn the black box of email deliverability into a transparent dashboard. Mailwarm helps you safely warm up your sender reputation, track the right technical signals, spot infrastructure issues early, and understand exactly what needs attention.
Cold outreach and email marketing are still unmatched growth channels but only if your audience actually sees what you send...
We are back with Mailwarm 2.0 🤘🏻! We’d love your support, your feedback, and for any email questions just drop them in the comments below :))
mailX by mailwarm
Hi everyone 😁
Email deliverability is usually something people notice only when results start dropping, and it’s not a good thing as this negativity affects your campaigns.
That’s exactly why we worked on Mailwarm, to help teams warm up their inboxes properly, keep track of what’s happening, and understand what needs to be fixed before deliverability becomes a bigger problem.
We are excited to launch this today, and we are also curious to know how the Product Hunt community is handling email deliverability.