8 Best Cold Email Warm-up Tools in 2022

Mateusz Supel
best email warm-up tools

Have you ever wondered if every email you send from your mailbox will be successfully delivered?

If you want to avoid the SPAM folders and land your cold emails in your prospects main inboxes, this article is for you.

Warming up domains and emails is crucial to build a good sender reputation and have high deliverability, and warm-up tools are there to help us and make the process quicker.

There are a lot of email warm-up tools to choose from. In this blog post I’m presenting 8 of them.

Manual vs automated email warm-up

The warm-up process is necessary if you care about the success rate of your cold email campaigns. After all, you won’t get replies if your emails land in spam.

To cut things short, there are two ways you can handle the process: manually or with a tool.

When you’re warming up your emails by hand, you’ll get a good reputation. The downside is that it’s time-consuming and that you need to remember to increase the volume gradually. This means you need to keep it in mind every day, so there are no breaks in the process.

You also need to learn how to do it in the first place.

When you’re warming up your emails automatically, the process gets a whole lot easier. It’s easy to start and – what’s most important – it runs on autopilot, so you don’t have to worry about how it’s going. It also saves you your precious time.

If you decide to go with automated email warm-up, you need to find a tool that you can rely on and trust that it will do a good job.

So without further ado – here are the 8 warm-up tools we picked.

8 best warm-up tools

1. Woodpecker – free warm-up

free email warm-up in Woodpecker

Woodpecker users can warm up their email addresses and domains free of any additional charge. Once you’re a customer, you can use the warm-up feature.

You can use as many warm-ups as you have slots. 1 slot = 1 warm-up. 2 slots = 2 warm-ups. And you don’t have to use it on the email account you’re sending from. You can use one email address for active outreach, and warm up another at the same time to prepare it for sending.

This approach also makes sense because it’s best to let a new email warm up before you start sending cold emails from it.

warm-up & recovery modes

If you’re on the lookout for an email warm-up tool, a factor to consider is if it can do exactly what you need in a safe way.

Email warm-up and domain warm-up need to be handled differently. If you try to warm up your new domain in a way that’s meant to warm up an email, it won’t cut it – you won’t have a warmed up domain that’s ready to send emails at scale.

Thankfully, Woodpecker caters to both scenarios. You can use the feature to warm up emails or domains.

If you notice your sender reputation decreasing, this feature may also be used for recovery. Or to keep your deliverability high.

All this helps you to save time, increase your deliverability and the safety of your sending.

The Warm-up and Recovery feature is included in your subscription.

email warm-up & recovery Woodpecker

The setup takes a couple of minutes. All you need to do is plug in your mailbox, choose the mode you need (email warm-up, domain warm-up or recovery), Woodpecker will handle finding the optimal settings and safe sending frequency for you.

BONUS: Every Woodpecker user gets 1 slot for free to their subscription. No matter how many you have, right now you get one more. So if you’re starting out and just bought one slot, you’re actually welcomed with 2 slots and 2 warm-ups. Not bad, right?


The email warm-up service is free for Woodpecker users (included in your subscription).

To sum up:

  • Included in the price for Woodpecker users
  • Different warm-up scenarios: for emails and domains
  • A recovery mode to regain or keep a good sender reputation
  • Quick setup
  • As many warm-ups as you have slots
  • You get 1 slot extra for free, so you start out with 2 slots + 2 warm-ups in the price of 1 slot

2. Mailwarm

email warm-up tools - Mailwarm

Mailwarm is a dedicated email warm-up tool.

The email warm-up process by Mailwarm is very simple: the user’s email account will automatically send a big amount of emails to +1000 Mailwarm’s account and get replies.

The daily interactions from Mailwarm are set according to how the user sets the sending schedule.

Mailwarm retrieves these emails from the spam folder, opens them, marks them as important and receives a reply (which is how all email warm-up tools work).

Mailwarm gives you the ability to view your daily activity data on a dashboard so you can make tweaks or pause the process.


The pricing at Mailwarm is quite expensive, as you’ll have to pay as much as $79/month for their Starter plan, which includes up to 50 Mailwarm emails/day, 1 account to warm up, and 1 seat.

3. QuickMail Auto-Warmer

Auto-Warmer is an email warm-up tool by Quickmail.

The tool automatically responds to some of your emails. It’s done with real people’s accounts.

It slowly increases the sending volume, so it makes the user’s activity not suspicious.

In case any email lands in the spam folder, Auto-Warmer gets them out, signaling to the ESP that this email is not spam, and generates a reply.


QuickMail’s AutoWarmer service is free for up to 50 inboxes per account. You need to complete their 14-day trial first.

4. Lemwarm – lemlist’s feature

Lemwarm, the email warm-up tool from lemlist, was the first on the market.

Here’s a few words on how it works: you yourself choose how many emails you send per day and then the volume automatically increases.

The tool exchanges warm-up emails with real people.

A huge bummer is that there are no distinct scenarios for email and domain warm-up, though. Which means there’s a high possibility that they won’t get warmed up properly – warming up an email for 2 days won’t do.

Lemwarm also claims that the set up time will take you no longer than a minute.


This feature will cost you $29 a month per inbox.

5. Reply.io

Reply.io, which is a cold email tool like Woodpecker and lemlist, offers an email warm-up feature as well.

The feature automates the warm-up process by sending and engaging with your emails. It works with G suite and Outlook.

It allows you to configure the settings based on your needs: for a new email account, to protect your reputation, and to remove from spam.

Users can track their process in a dashboard.

Warm-up emails are organized in a separate folder in the users inbox.


$29 per month per email account.

6. Warmup Inbox

Warmup Inbox is an email warming service.

It’s integrated with many email clients, such as: Gmail and Outlook 365, Yahoo Mail, Amazon SES, Mailgun, Sendgrid, SMTP, Sendpost, Microsoft 365, Zoho and Google Workspace.

The tool will automatically raise your sender reputation through the network of inboxes exchanging messages.

Warmup Inbox sends emails on behalf of your email address to other platform users. Those emails will be opened, replied to, engaged in threaded discussion and favorited to simulate a real human interaction.


The price is $9 per month per inbox.

7. Warm Up Your Email (Mailshake)

Warm up Your Email is an email warm-up tool that was acquired by Mailshake.

The team behind the tool warms up your inbox by opening your emails, replying to them and removing them from spam.

This tool is integrated with such tools as Gmail, Outlook, AmazonSES, Sendgrid, Mailgun, ZohoMail and some others.

You can review your spam score, which means you can see how many times your email landed in spam. You can also review your spam pattern to see how using the warm-up feature is effective.


  • Sole Sender – $29 per month

Max 50 positive engagements a day, 1 email account, spam pattern analysis.

  • Pro Sender – $49 per month

50 positive engagements a day each account, 3 email accounts, spam pattern analysis.

  • Agency sender – $99 per month

100 positive engagements a day (for each account), 8 email accounts, spam pattern analysis.

8. Warmbox

Warmbox is an individual email warming service.

The tool sends everyday realistic emails from the user’s inbox, removes them from spam folders, opens, bookmarks and replies to some of them.

The 10,000+ inboxes that the system uses are a mix of the most important email service providers.

There are 4 options to choose from: Grow – progessive, Flat, Randomize, and Custom.

Warmbox integrates with such email providers as: Gmail, Outlook, Yahoo! Mail, iCloud, AOL, Yandex, Zoho, Amazon SES, Sendgrid, Mailgun, and any other inbox (SMTP).


Starts at $15 per month for 1 inbox, $69 per month for 3 inboxes, $139 per month for 6 inboxes.

Back to you

Warm-up tools are extremely helpful when it comes to getting your cold emails into the main inbox of your prospect.

This article presents the best email warm-up tools available in 2022.

Some of them are free and some of them are on the pricier side.

Bearing in mind the warm-up feature needs to be running for rather an extended period of time in order to successfully warm up your mailbox and domain, it’s reasonable to choose a free option.