3x your email response rate! – Only $15 Per Inbox!

Get a 60% sales productivity boost by avoiding spam folders!

Ever wondered how many deals could you have closed if only your emails did not end up in spam? More replies = more revenue.
Start 7-day FREE TrialBook a demo
trusted by sales and marketing teams large and small

Case Study

|

  • Our Customer

    i-batu  is a B2B company based out of Spain that helps companies in the metallurgic industry create effective sales campaigns, and uses SaaS to improve their customers’ business strategies.
    “Overall, Warmup Inbox was easy for i-batu to use, required no technical skills or extra work, and gave major results at a low price. I-batu remains a happy Warmup Inbox customer, and the days of low open rates are long gone.”

  • Low Conversion Rates

    Despite sending cold emails, they were struggling to reach their target clients, and experienced low conversion rates due to high bounce and low response rates. But i-batu wasn’t alone in their struggle – many of their client companies were landing in spam folders and having their emails go unopened. To overcome this issue and help their customers rise above their competitors, i-batu had to find a solution.

  • How i-batu Escaped The Spam Folder

    Warmup Inbox focuses on warming up emails and monitoring domain and IP reputations. With Warmup Inbox, i-batu was able to quickly connect its emails, without using hours of labor or needing any technical skills. Also provided essential tools for setting up authentication parameters in the host DNS zone, ensuring that i-batu’s emails were delivered to the inbox and not marked as spam. By gradually building a relationship with its target clients through personalized, valuable content, i-batu was able to establish trust with their customers, and generate high-quality leads. Implementing Warmup Inbox into their marketing strategy was highly effective for i-batu, resulting in a 15% response rate and 60% open rate.

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

Learn more

Language Warmup

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

Learn more

ESP Warmup Tool

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

Learn more

Email Warmup

Increase your email deliverability with specific providers.

Learn more

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.
View All

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.