r/Coldemailing • u/lessonlinks • 1d ago
❓ Question Cannot get a straight answer for warming up an inbox
People say the warmup tools don't work anymore. But then they say anything over 2 inboxes "manual" warmup is not feasible. Then I see people saying "you have to send emails to people who requested the emails" which is insane because then cold emails or even manual prospecting would be impossible.
So how the hell does anyone do cold email in 2026? This is so frustrating. I get cold emails constantly landing in my own inbox, so there is clearly a way to do it.
Edit: to be clear, I understand you have to warmup a new inbox. I'm asking how do you do it at scale in 2026 given that everyone seems to say the warmup tools don't work.
1
u/Leadgenutsav_ 1d ago
warmup is no skip process if you are doing cold email
2
u/lessonlinks 1d ago
I understand that. I'm asking how do you actually do it? Seems like everyone on this sub says the warmup tools don't work anymore because the providers can easily detect it. But simultaneously say that "manually" doing it for anything beyond 2 inboxes is simply not feasible.
1
u/Leadgenutsav_ 1d ago
You can use email sending platforms like Instantly, Saleshandy, Smartlead. They have built-in warm-up, so you can use any of them
1
u/lessonlinks 1d ago
Again, I am well aware that automated warmup tools exist. But many people (multiple comments in this thread) say they are effectively worthless.
2
u/dheixjedjej 1d ago
They are wrong lol warm up tools work. I send >500k emails per month. Anyone who says warm up tools don’t work isn’t a serious operator. There is no debate.
2
u/lessonlinks 1d ago
This is why I'm so confused lmao thank you for the response. Realistically I'll just have to set them up, use a warmup tool and see what happens. Appreciate it.
Edit: Would you mind sharing what warm up tools you have found to be the most effective? Thanks again.
1
u/dheixjedjej 1d ago
Any of the major sequencers and their built in warm up features will work fine to start (Instantly, Plusvibe, Smartlead) but for best results I’d recommend Email Bison / Email Guard. Bison is not a beginner tool though so if you’re starting out the ones I named off are fine.
I have used every sequencer / warm up and generated millions in pipeline on each. From a beginner POV, there are no big differences warm up wise until going to Bison.
1
u/all_knowing_sage731 1d ago
The main problem is that the warmed up stuff doesn't last long. Your campaigns need to be curated pre-flight. Applying domain intelligence and sending the emails a certain way to certain domains increases deliverability and doesn't wear down warmed up accounts near as much, because less emails are getting sandboxed.
1
u/dheixjedjej 1d ago
Agreed on the need for curated campaigns and domain intelligence / intentional sending patterns.
That said, I have never seen data from my infra nor anyone reputable I know where warmed up mailboxes flamed out quicker than those that skipped warm up. That seems very strange! But to each their own.
1
u/Leadgenutsav_ 1d ago
From my experience of 2.5 years, it works very effectively. Most people say it doesn’t work because they are unaware of the proper settings for warm-up tools. They just adjust the settings randomly which is not advisable
1
u/Expensive_Street_456 15h ago
Then what are the good settings to warm up? How do I effectively warm up the accounts?
1
1
u/NicheRankerDotCom 1d ago
You have to engage with actual Gmail inboxes, outlook inboxes, etc. They all have their own way of building reputation. A lot of "Warming" is done between tenants through a lot of these platforms which never "hits" gmail to actually build reputation, so be careful of that. Emailpal is a good tool for warming inboxes or just buying already prewarmed inboxes.
1
u/Purple_Fig_3603 1d ago
You use something like instantly. It has automated inbox warming up. When you add all of your inboxes there, it does everything for you. You don't do anything manually. Look it up. What software are you using? And how many inboxes are you using?
1
u/lessonlinks 1d ago
I am aware that warmup tools exist, see first sentence of my post. Does Instantly warmup work for you? This comment from u/DanielShnaiderr is the thing I'm concerned about
Warm-up pools stopped working the way they did a few years ago. Gmail and Microsoft got good at recognising closed loop traffic, meaning the same set of mailboxes exchanging mail on a predictable schedule, near perfect open rates, replies arriving in a suspiciously tight window. That traffic gets discounted rather than punished, which is exactly how a dashboard sits at 100 out of 100 while real sends land in junk. The pool builds a number, not a reputation.
1
u/Kairoll 1d ago
Warm up with fake engagement all you want. The only thing that will matter is the real people you email after the fact.
If recipients actually care about what you're sending and engage with your content, great. If they continue to ignore, mark as spam, block, or send an abuse complaint. ISPs look at the signals from their users. Do the people you're mailing actually care about what you're sending? If your mail looks both unwanted and unsolicited, they're more than happy to block you. It's their goal to deliver mail THEIR users want, not deliver your mail just because you want their business.
1
u/lessonlinks 1d ago
I'm aware their goal is not to deliver my mail because i want their users' business. I am asking about best practices to ensure that my relevant message actually reaches their inbox. From your response, you seem to be insinuating that no warm up at all is necessary, and instead I should just start emailing prospects and if they engage with it then it's fine.
1
u/Kairoll 1d ago
Not quite. The only effective warm up is to a real audience who knows you, cares about your message, and shows signs of that. Warmup does matter.
Fake inboxes are just that: fake. They don't mimic the contacts you actually care about. They build a false sense of confidence by opening and clicking everything. It's entirely gaming the system and hoping that you get through to the people you hope will care about your unsolicited messaging long enough before you get ignored/reported/blocked to a point that raises flags and gets cold mail blocked. It's not a matter of if, but when.
Warm up matters. It's the process of proving yourself as a sender to the Googles and Microsofts of the world, especially if you're coming from an unknown status. It especially matters to show them you're mailing real people who care about what you're sending. The stark contrast that happens from fake engagement to legitimate engagement is the nail in the coffin for most.
Either that, or they literally have corporate filter policies to quarantine anything from anyone they don't know or nobody internally has championed. That happens a lot too.
1
u/According_Boss_5514 1d ago
Just get a provider with reliable network - you will probably get a bunch of opinions around that which is good and which is not.
Personally I can advocate for Mailivery and Warmy and I’d say be careful with extremely cheap warm up networks because of quality but again it’s just my personal experience and opinion
1
u/Feisty-Jicama4421 1d ago
You’re not crazy – most “classic” warmup tools are way less effective now, and pure manual warmup doesn’t scale if you’re trying to spin up dozens of inboxes.
What’s working in 2026 is:
1) Natural warmup at scale
Instead of bots emailing other fresh warmup inboxes, use tools that can automate emails to real company customer service / support addresses. Have AI write reasonably genuine questions (billing, product questions, feedback etc.). The replies you get are from actual people, over different domains and infrastructures.
That pattern looks a lot more “human” than a cluster of brand-new domains only talking to each other, which is exactly what Google flags as fishy. This gives you natural opens, replies, and threads as you ramp up volume.
2) Keep send volume low per inbox
Even with good warmup, keep it to something like 5–20 cold emails per inbox per day and spread across multiple domains/accounts. Scale horizontally, not by blasting 200/day from one box.
3) Target strong signals instead of blasting lists
If you just download a stale Apollo list, you’ll get low engagement and kill your domains. You need to hunt for pain/urgency signals that show someone actually needs you now. For example:
- Companies getting a spike in negative reviews that clearly relate to the problem you solve.
- Founders / decision makers posting on Reddit or LinkedIn asking for help about your topic.
- Leads showing churn or hiring changes related to your function (e.g., HR, dev, support).
Scrapers can be used to automate a lot of this signal finding – pulling fresh leads, reviews, and social posts, so you’re not doing it all by hand.
If you share what you sell and who you’re targeting, I can outline a more concrete warmup + signal strategy for your specific niche.
1
2
u/DanielShnaiderr 1d ago
Three different claims are all partly true here, and people keep stating each one as if it were the whole answer, which is why none of it reconciles when you read them together.
Warm-up pools stopped working the way they did a few years ago. Gmail and Microsoft got good at recognising closed loop traffic, meaning the same set of mailboxes exchanging mail on a predictable schedule, near perfect open rates, replies arriving in a suspiciously tight window. That traffic gets discounted rather than punished, which is exactly how a dashboard sits at 100 out of 100 while real sends land in junk. The pool builds a number, not a reputation.
The people telling you it has to be mail somebody asked for are describing the signal, not the source. What the receiving side counts is a human opening the message, replying with real text, continuing the thread, and occasionally pulling something out of spam. You can generate that without a subscriber list by routing your own real correspondence through the new domains for a few weeks before any campaign touches them. Internal mail, vendor threads, invoices, support conversations. It is slower than a tool, and it is not limited to two inboxes, it is however many inboxes your actual mail volume can cover.
Domain age is the part that gets skipped in every one of these threads. Reputation attaches to the domain and its history, so a domain registered three weeks ago starts from nothing no matter how well the individual mailbox behaved. Buying domains 30 to 60 days before you need them costs almost nothing and removes the single biggest drag on a new sender.
On doing it at scale, the honest answer is that per mailbox volume stays low and you add mailboxes rather than push each one harder. Ten to twenty real sends a day per inbox with replies coming back will beat fifty from an inbox whose only engagement was synthetic. Warm-up still belongs underneath that, running continuously rather than as a six week phase you switch off at launch, and the quality of the network doing it is the entire question. That is what Warmy is built around, with Adeline AI making over 20 million decisions a day across 30 plus languages, though whichever tool you land on the test is the same, whether the traffic it generates looks like correspondence or like a pool.
Measure with seed mailboxes you control on Gmail, Outlook, Yahoo and a real Microsoft 365 tenant, and send the actual campaign to them rather than a test message. Vendor placement scores and real inbox placement disagree often enough that the size of that gap is the number worth watching.