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
Launched this week
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 / Built With
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.
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.
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!
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?
The landing page look is pristine. Quick question on the "infrastructure checks"does the tool actively monitor for configuration drift (like if a teammate accidentally messes up the SPF/DKIM records downstream), or is it just an onboarding check? good job team
mailX by mailwarm
@vikramp7470 To help you get the best possible results right from the start, we’ve integrated with our sister tool, Themailx, allowing you to check your DNS records instantly!
To back this up, our deliverability experts also conduct a thorough, manual audit of your domain. We verify your DNS setup, check your domain health against major blocklists, and send you a personalized email with clear steps for any needed optimizations.
A successful warm-up relies on a flawless foundation. While MailWarm does the heavy lifting, it works best when your domain infrastructure is perfectly aligned, and we’re fully committed to guiding you every step of the way to maximize your deliverability.
Mailwarm
@vikramp7470 Thank you so much for the kind words about the landing page! The team worked hard to keep it clean.
Regarding the infrastructure checks: It is 100% active, ongoing monitoring.
We know firsthand how easily a downstream teammate can accidentally overwrite a DNS record months after onboarding. Mailwarm doesn't just check your records at the start; it continuously tracks your SPF, DKIM, and DMARC health in the background.
If configuration drift happens, the tool catches the signal drop and flags it on your dashboard early, saving you from a deliverability crisis.
Appreciate you stopping by and asking such a good question :)
Mailwarm
Ormedo
@othman_katim congratulations on the launch 🙌, this is a big problem you're tackling as email rules have become way stricter with the new wave of agents!
I'm curious how long does it usually take to warm up, and what's the reasoning behind the default numbers? (did you test on different ones before settling on those?)
Mailwarm
@skander_karoui Usually 4-6 weeks from a cold start, faster if there's an existing reputation. The defaults come from patterns across +19000 customers. We tested steeper and flatter curves early; both underperformed the current model. Are you warming a fresh IP or one with sending history?
We use a similar service. How many warm-up accounts do you have, and how often are they rotated? Because if, for example, the warm-up is done using the same 100 mailboxes over and over, it will lose its effectiveness after a month.
Mailwarm
@natalia_iankovych You're right, small networks kill the warm-up positive effect; we operate +50 000 across the major providers, and they rotate daily.
Mailwarm
@natalia_iankovych To be honest, I am happy and proud to write this answer.
And you’re 100% right. If warmup runs on the same small pool of inboxes over and over, it quickly becomes repetitive and loses value.
Mailwarm runs on a network of 50,000+ real and aged inboxes (by the way, mailwarm exist since 2020). The goal is not just to “send warmup emails,” but to create diverse, positive inbox interactions across providers, with enough rotation, email provider mix, and engagement behavior to support sender reputation over time.
That’s also why we built Mailwarm 2.0 beyond basic warmup: monitoring, infrastructure checks, provider visibility, and expert review. We want teams to know if their reputation is actually improving, not just see activity running in the background.
Are you mainly using warmup for cold outreach or for a larger email marketing setup?
@thamibenjelloun Cold personalized outreach campaigns.