Get 3X higher open rates!  – Only $15 Per Inbox!

Avoid spam folders and generate 3X more email leads.

Lead gen outreach ain’t easy — if your inbox isn’t prepped, your emails hit spam. Warmup Inbox keeps your emails out of spam, gets you more leads, and keeps your inbox healthy by warming it up and tracking key metrics.
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Case Study

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  • Our Customer

    Leadspicker is a sales automation tool that allows you to build lead generation workflows and agents, and send multichannel outreach campaigns. By combining LinkedIn and email, it maximizes your results all within a single platform.
    “We found Warmup Inbox in 2019, and since then we’ve seen a significant improvement in key metrics, including higher email deliverability, an increase in the number of replies, and an improved open rate.”

  • Building a Warmup Feature To Help Our Users Send A Higher Volume Of Emails

    We wanted to give our users some ability to utilize warmup services directly in our platform to help them send a higher volume of emails and keep their inboxes healthy. Warmup Inbox was the most logical decision. We had a great experience with them from our lead generation business, so we decided to give our users an easy opportunity to turn on warmup services directly in their Leadspicker account. They do not need to switch their interface and can use one of the best warmup services on the market directly in a platform.

  • Integrating Warmup Inbox Into Our Product To Quickly Deliver The Feature

    Warmup Inbox saved us nearly two years of work by improving email deliverability through a quality warmup network. It helps land emails in primary inboxes and recover damaged ones. For new inboxes, run warmup for 10–14 days, then start cold outreach slowly. For existing ones, activate Warmup Inbox and let it assess inbox health over 3 days. Since deliverability rules change often, ongoing tracking is essential.
 We currently have ~100 users actively using it from our platform.

Features

Whether you’re using email to promote your product, get more leads or do link building outreach, you won’t get far if a big number of your emails ends up in spam.

Cold Email Sequence

Automate, personalize, and manage your cold outreach campaigns.rnrn

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Language Warmup

Increase your email deliverability and engagement by connecting with your prospects in their language.

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ESP Warmup Tool

Start landing in the inbox instead of the spam folder.rnrn

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Email Warmup

Increase your email deliverability with specific providers.

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Pricing

Get the right plan for your team and scale your email outreach effortlessly.

Warmup Inbox Blog

Welcome to the Warmup Inbox Blog, your go-to resource for mastering cold emailing, email marketing, and email warmup strategies.
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Frequently Asked Questions

  • Email warmup is a process of preparing a new (or long-inactive) email account for future email outreach, campaigns, etc. It is especially useful for cold email inboxes that usually suffer from lower deliverability rates due to the character of the emails they send.
  • Connect your email account to the Warmup Inbox network. Our system automatically sends and receives emails on your behalf, gradually increasing the volume and engagement (opens, replies, “mark as important”) to prove to providers that you are a trustworthy sender.
  • Yes, but proceed with caution. We recommend keeping your campaign volume low (e.g., under 20-50 emails per day) during the first few weeks. Let the warmup tool handle the majority of the traffic to establish a solid reputation baseline before you scale up.
  • We support all major email service providers, including Google Workspace (Gmail), Microsoft 365 (Outlook/Exchange), Yahoo, and Zoho. Additionally, we support any custom email provider that allows connection via SMTP/IMAP.
  • Email warmup is the process of gradually building trust with email providers. By slowly increasing your daily sending volume and generating automated positive engagement (opens and replies), you prove you aren’t a spammer, ensuring your real campaigns land in the primary inbox instead of the spam folder.
  • A pre-warmed email address has a consistent sending history and steady engagement. It shows natural activity patterns, real replies, and stable deliverability metrics.

    Inbox providers see it as a trusted sender rather than a sudden spike of cold outreach. That trust increases the chances of your emails landing in the primary inbox instead of spam.
  • If you’re only sending a few emails to people you know, no. But if you are sending hundreds of cold emails for lead generation, yes. Warmup prevents providers (like Google) from flagging your sudden volume spikes as spam by simulating natural, human-like sending behavior first.
  • 14 to 21 days is the minimum. Spam filters actively look for a “slow ramp” in activity. If a new inbox blasts hundreds of emails on day one, it gets blacklisted instantly. Rushing the process almost guarantees your domain will be burned.
  • Yes, by building a positive sender reputation. Our network automatically opens, replies to, and rescues your emails from spam folders, training algorithms to trust your domain. However, to stay in the inbox, you still need to send good, personalized email copy.