Mailwarm 2.0 - The email warmup tool, upgraded for deliverability.
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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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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.
@thamibenjelloun How are you separating warmup from true deliverability signals especially for teams that already have decent sending volume but still see inbox placement drift?
Mailwarm
@swati_paliwal Warmup is one input, but an important one: positive inbox interactions help keep sender reputation healthy, even when you already have decent sending volume.
But true deliverability needs a wider view: inbox placement, authentication, infrastructure, reputation trends, and sending behavior.
If you’re in this situation, happy to offer a free call with one of our deliverability experts to challenge your setup, audit what’s happening, and point you to the highest-impact fixes.
Are you currently seeing inbox placement drift on one provider specifically, Gmail or Outlook or even Yahoo?
Mailwarm
@swati_paliwal Seperate tracking allow us to monitor how these two perform, based on that, we can manage how we can improve the overall performance.
@thamibenjelloun congrats on the launch team. Other than the usual culprits (dkim/spf/dmarc etc) what are you seeing Mailwarm flag that is otherwise hard to track down?
Mailwarm
@zolani_matebese Beyond SPF/DKIM/DMARC, I would say a hard-to-spot issue is often reputation drift, provider-specific inbox placement (Gmail, Yahoo, Outlook, Hotmail).
We have added this feature so that you can monitor your spam score per provider.
Other isses could be blacklist risk, weak engagement signals, or sending behavior that slowly damages trust.
If you’re seeing this kind of issue, happy to offer a free call with one of our deliverability experts to challenge your setup and spot what’s hidden.
Are you currently trying to debug a drop in replies or inbox placement?
Mailwarm
@zolani_matebese We bring real performance data to light about inbox placement, and what I like about that is being able to then pivot my warm-up strategy based on that.
@thamibenjelloun Great work! Still wanted to ask you, how you differentiate from Tools like lemlist or instantly?
Wish you all the best for your Journey!
Foyer
Inbox placement is a deliverability problem, but most warmup tools treat it as a volume problem and just blast engagement signals until the ESP gets suspicious. Curious what actually changed in 2.0, specifically whether you're doing anything smarter around ramp curves and sending patterns, or whether the upgrade is mostly on the dashboard and reporting side. Also wondering how you handle situations where a domain's reputation is already damaged before warmup starts, since that's a different problem than warming a fresh domain.
Congrats for the launch
Mailwarm
Mailwarm
@fberrez1 Ooh very good question, you are entirely right: ESPs are incredibly smart now, and treating deliverability as just a volume game is a fast way to getting a domain blacklisted.
The upgrade isn't just cosmetic. 2.0 introduces dynamic, non-linear ramp curves. The algorithm constantly randomizes sending intervals, reply footprints, and engagement spacing. It acts like an organic human inbox pattern, preventing ESPs from identifying a mechanical warmup signature.
& For a fresh domain, you're building a foundation. For a damaged domain, you are in triage. The system prioritizes pulling emails out of spam, marking them as safe, and generating realistic thread replies. It's about feeding the ESP signals to work on the trust baseline before any real volume ramp-up is even allowed to start.
Thank you for your support :))
Mailwarm
@fberrez1 Exactly. The majority of platforms try to make you think that one-size-fits-all breaks down fast. Gmail's algorithm isn't Outlook's, they weight engagement, authentication, and sending behavior differently. Generic warmup won't catch that.
@fberrez1 From the marketing side, I always wonder how many founders think they have a “spam problem” when it’s really a mix of setup, reputation, list quality, targeting, volume, and messaging.
Hey Thami,
Cool launch! Quick question: do you see Mailwarm as something companies should use long term or only when launching on new domain?
Mailwarm
@bhouy To be honest, this has been one of our biggest challenges.
When we launched Mailwarm 6 years ago, “email warmup” was barely a known category. But the word warmup makes people think it’s only for the beginning, like a short-term setup step.
After seeing thousands of senders over the years, our view is different: warmup is useful long term to keep positive engagement and protect sender reputation. Or at least, it should be reactivated when reputation drops or before scaling a new campaign.
So I’d say: new domain = warmup is critical. Existing domain = warmup + monitoring is how you avoid silent reputation drops.
Are you asking because you see warmup as a one-time setup, or because you’re thinking about long-term deliverability?
@thamibenjelloun I totally get the challenge because for me warmup implies once and done. I do care about long term deliverability of course, but I have to admit I'm not sure why I would need a warmup tool for that.
Mailwarm
@bhouy Benjamin, that’s the perception we need to change.
Warmup is not only “get the domain ready once”. It’s more like reputation maintenance.
If you already send, Mailwarm keeps creating positive inbox interactions around your inboxes so your sender reputation stays healthier over time. It does not replace good sending practices, clean lists, or relevant emails, but it adds a consistent trust signal to the providers, in the background.
The way I see it:
New domain: warmup helps you start safely.
Existing domain: warmup helps you recover and improve reputation.
Scaling campaign: warmup helps reduce the risk of a sudden reputation drop.
So the real question is not “do I need warmup forever?”
It’s more: “how much reputation protection do I need based on my sending volume and risk?”
Are you currently sending cold emails regularly, or more occasional campaigns/newsletters?
Have been using mailwarm recently, excited to see what has changed here
Mailwarm
Thank you for your trust @abhishekr_ai. This is the original mailwarm, upgraded. Check it here :
Mailwarm
@abhishekr_ai Great to have an existing user in the thread! You are going to notice a massive difference with 2.0. Can't wait for you to try it out. Let us know your thoughts once you dive in :))
This is exactly what I need right now! Been struggling with deliverability issues since launching my new domain. The concept is simple and the problem is real. Congrats on the launch!
Mailwarm
@ouidad_yassin Thank you. Don't forget to book a call^_^
Mailwarm
@ouidad_yassin I feel you new domain deliverability is a massive headache right now, so you are definitely not alone in that struggle.
Thanks for the support on the launch, and here’s to getting your emails straight into the primary inbox! Let us know if you need any help navigating it ;)
mailX by mailwarm
@ouidad_yassin Thank you! We are here to help with the struggles!
Congrats on the relaunch! it's bold move going paid-only with no free tier. That makes the first week after payment the real moment of truth. Do you know which early signal makes people stay vs leave or ask for a refund: first email pulled out of spam, the reputation graph ticking up, or something else? Curious how sharply you can see that point, like aha-moment
Mailwarm
@and_bayleaf Andrew, great question.
For us, the “aha moment” is when the customer sees that Mailwarm is not just sending warmup emails in the background. It actually helps them protect reputation and track improvement.
A result like this (screenshot) is exactly why people stay.
When you see that kind of movement, you understand the value immediately.
The real retention signal is when users stop seeing warmup as a one-time setup and start seeing it as reputation protection + monitoring over time.
That’s why Mailwarm 2.0 adds the expert-led layer too: if numbers don’t move, our team helps you understand what to fix.
@thamibenjelloun Love that framing, it's the difference between a tool people set-and-forget and one they check daily. Thanks for the thoughtful answer, rooting for the launch
Mailwarm
@and_bayleaf Thanks. Free tiers attract a lot of profiles who never implement anything, and warmup only works when someone's committed to the process. Going paid means we can focus our deliverability team on people genuinely invested in fixing placement, which keeps service quality high for everyone.
On the aha moment: it's the reputation graph ticking up paired with that first batch landing in the inbox instead of spam. Usually shows within the first 20 days. That's when it clicks, they see the trend line moving and the placement data backing it up.
Makes sense. Free tiers full of tourists would drown you. Curious if you saw activation/retention actually improve after cutting free?
Mailwarm
Hey Product Hunt 👋
Years ago we launched the first Mailwarm right here. That launch started a beautiful journey for us, and I'm really grateful for it.
Now we are back. With more experience this time. We spent a lot of time listening to our customers, adding features they really asked for, and also removing the ones that only made things complex without real value.
And honestly this last part was our biggest fight inside the team. Where is the line between useful and too much? If you add too little, the product feels empty. If you add too much, it becomes the heavy thing you wanted to avoid in the first place.
So I'm curious, how do you draw this line as builders? Where do you stop adding? And what is one feature in your own product you think you should drop?
Mailwarm 2.0 is the answer we found. Simpler, sharper, built on everything we learned the first time. Would love to hear your feedback 🙏
And a big thank you to @garrytan for hunting us.
Crossnode
Big congratulations to the Mailwarm team on the launch! 🚀
We just started running an email campaign ourselves and discovered that a significant portion of our emails was landing in spam. We had already completed the warm-up process, configured SPF, DKIM, and DMARC correctly, and followed most of the recommended best practices, so it was surprising to see deliverability issues persist sadly.
We searched for a solution that could help diagnose and improve inbox placement, but we couldn't find anything that addressed the problem end-to-end....
One question tho! For users who have already warmed up their domains and configured everything but still experience poor inbox placement, what are the most common issues your platform tends to uncover?
mailX by mailwarm
@rania_rimali Great question. Surprisingly, in many cases the issue isn’t authentication or warm-up at all.
The most common problems we uncover are low sender reputation inherited from previous activity, poor list quality, engagement signals that mailbox providers don’t like (low opens, replies, or positive interactions), content patterns that trigger filtering, and inconsistencies between sending behavior and recipient expectations.
We also frequently see domains that are technically configured correctly but have underlying reputation issues that aren’t obvious from standard SPF/DKIM/DMARC checks.
That’s exactly why we built the platform, to help identify the less visible factors that impact inbox placement and provide actionable recommendations beyond the usual setup checklist.
Out of curiosity, what percentage of your emails were landing in spam after you completed the warm-up process?
Mailwarm
@rania_rimali Thanks for the support! You are definitely not alone in this this is the hidden nightmare of modern email marketing. Modern spam filters don't just look at your setup anymore; they track ongoing behavior.
When a team tells us their DNS is perfect but deliverability is still bad, Mailwarm usually uncovers IP-level throttling (your email service provider's shared network is compromised), ESP-specific drops (being blocked by Outlook while Gmail is fine), or velocity triggers (sending too fast within short windows).
Deliverability is a moving target, and sometimes a single bad campaign or a dirty IP pool can undo your hard work. We'd love to help you pinpoint exactly where the leak is
Mailwarm
@rania_rimali Happy to jump on a call to audit your setup and define the recovery plan!
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 🚀
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 🚀
ProdShort
@othman_katim Bonjour 👋, how long does it typically take before someone sees improvement in their inbox placement rates? Congrats, amazing team !!