IP Warming Strategy & Tools To Use

Created On:
February 1, 2024
Updated On:
March 13, 2024
IP warmup strategy

One of the most pivotal factors that dictate the success or failure of your cold email campaign is often overlooked - the IP warming strategy and the tools used in the process. It's a common oversight, even among seasoned email marketers, to dive headfirst into a cold outreach campaign without properly warming up their domains and email accounts. 

This rush can lead to disappointing results and wasted efforts. Therefore, today's article will focus on shedding some light on this often-neglected aspect. We will delve deep into the intricacies of IP warmup strategies, the effective tools you should be using, and why it's imperative to incorporate them into your marketing arsenal. 

Most importantly, we'll discuss why warming up your email domain is crucial for the success of your cold outreach campaign. With relevant statistics and real-world examples, we aim to provide a comprehensive cold email warmup guide. So, let's embark on this journey of understanding the importance of a well-executed email warmup process and how it can make or break your cold email campaign.

What is IP Warming?

Diving straight into the meat of the matter, let's unravel the concept of IP warming. In simplest terms, IP warming is the process of methodically adding email volume to a new IP address gradually over time. This approach is like breaking in a new pair of shoes; it allows email clients to recognize and trust your IP, thus increasing your email deliverability rates. 

The crux of an effective IP warmup strategy lies in its execution - starting with a low volume of emails and gradually ramping up the count. This cautious approach allows ISPs (Internet Service Providers) to observe and analyze your sending behavior, ensuring you're not a spammer. If you try to send too many emails too quickly, ISPs might mark your emails as spam, damaging your sender's reputation.

Why is this important for your cold email campaign? Well, consider this - statistics show that nearly 20% of legitimate emails never reach the inbox. This means, without proper IP warming, one-fifth of your carefully crafted cold emails could end up in the spam folder, never seen by your prospects. 

By following a rigorous cold email warmup guide and strategy, you can significantly increase the chances of your emails landing directly in the recipient's inbox, thereby enhancing engagement and boosting your campaign's success rate.

In cold email marketing, IP warming isn't just a recommendation; it's a necessity. The email warmup process is your ticket to gaining ISP trust, achieving high deliverability rates, and, ultimately, running a successful cold email campaign.

How Do You Warm Up Your Email Using Smartlead?

Warming up your email domain manually can be a daunting and time-consuming task, especially when you're gearing up to launch a cold email campaign to attract new customers. This is where Smartlead steps in with its innovative solution - an unlimited AI warmup feature designed to automate this entire process. 

Smartlead's AI warmup feature is like a smart assistant that takes over the heavy lifting, allowing you to focus on crafting compelling email content. It mimics human-like conversations and incrementally increases the number of emails sent from your domain. This gradual ramp-up is a key part of an effective IP warmup strategy, helping your domain reach optimal warmup levels. 

But why is this important? Well, when your domain is properly warmed up, it significantly increases the chances of your emails landing directly in your recipients' primary inbox, not their spam folder. Imagine all your carefully crafted cold emails being seen and read by your prospects rather than getting lost in the cluttered abyss of their spam folder. 

By automating the email warmup process, Smartlead not only saves you precious time but also enhances the success rate of your cold email campaigns. With Smartlead, warming up your email domain becomes less of a chore and more of a strategic step in your overall cold email warmup guide, setting you on the path to successful customer acquisition.

Step #1 - Add Your Email Account

The first step in your journey to a successful cold email campaign is as straightforward as it gets - connecting your email account with Smartlead. Whether you're using Gmail, Outlook, Yahoo, Zoho, or SMTP, Smartlead's wide-ranging compatibility ensures a smooth and seamless setup process. 

Here's the exciting part: Smartlead allows you to connect all your inboxes at once in bulk. Imagine not having to go through the grueling process of individually connecting each mailbox! This feature enables you to kickstart the email warmup process for all your mailboxes simultaneously. It's like having multiple runners on the starting line, all set to sprint towards the finish line - the finish line being optimal warmup levels for your email domains.

This bulk connection feature is a game-changer in your IP warmup strategy. It simplifies the email warmup process, saving you invaluable time and effort. With this initial setup, you're already one step closer to ensuring your emails land directly in your prospects' primary inbox, paving the way for a successful cold email campaign. Remember, a well-executed cold email warmup guide begins with connecting your inboxes, and Smartlead makes this step a breeze.

Step #2 - Enable Warmup

Step two is where the magic begins - enabling the AI warmup feature on your mailboxes. Once your accounts are connected to Smartlead, you can activate this feature and let it take over the heavy lifting of the email warmup process. 

One of the key elements in a successful IP warmup strategy is having control over the number of emails sent daily, and Smartlead delivers just that. You can select the total number of warmup emails to be sent each day and determine how many additional emails should be sent as you ramp up your strategy. 

But that's not all! Smartlead also offers the option to randomize the number of warmup emails sent daily, adding an extra layer of human-like behavior to your email activity. Moreover, you can set the reply rate for each warmup email, allowing you to simulate real conversations and further build trust with ISPs. 

Each of these features is thoughtfully designed to help you warm up your domain and IP to its optimal level in the most efficient way possible. While Smartlead takes care of the technicalities, you're free to focus on what really matters - crafting the perfect cold outreach message. With Smartlead, you're not just following a cold email warmup guide; you're making strategic moves that ensure the success of your cold email campaign.

How Do You Manually Warmup Your Domain?

Manually warming up your email domain is a process that requires a careful approach and a fair bit of patience. Here's a step-by-step guide to help you navigate this task:

  • Start Small: Begin by sending a few emails per day to trusted contacts who are likely to open, reply to, and engage with your emails. This helps you establish a good sender reputation with Internet Service Providers (ISPs).
  • Increase Gradually: Every day, increase the number of emails you send. This is part of the ramp-up process in a typical IP warmup strategy.
  • Monitor Your Reports: Keep a close eye on your email engagement metrics. High open and reply rates can speed up the warmup process.
  • Avoid Spam Traps: Ensure that your email list is clean and free of old, unused email addresses that could be spam traps.

Here's a sample template for your first warmup email:

Subject: Long time no see!

Hello [Recipient's Name],

It's been a while since we last connected, and I thought it's high time we catch up. How have you been? Any exciting updates you'd like to share?

Looking forward to hearing from you soon.


[Your Name]

While these steps may seem straightforward, manually warming up your domain can be time-consuming and tedious. It requires constant monitoring and fine-tuning to ensure your cold email warmup process is effective. 

That's why most professionals prefer using an email warming tool like Smartlead. It automates and accelerates the entire workflow, freeing up your time to focus on what matters most - crafting compelling email content and building relationships with your prospects. With Smartlead, you're not just following a cold email warmup guide; you're setting yourself up for success in your email marketing efforts.

Why Is Warming Up Your Domain Crucial Before Launching Your Cold Outreach Campaign?

Before we dive into the 'how,' let's explore the 'why.' Why is warming up your domain crucial before launching your cold outreach campaign? 

The answer lies in understanding how email service providers (ESPs) work. ESPs are on constant lookout for spammers, and a sudden influx of outgoing emails from a new domain or IP can raise red flags. This can result in your emails being marked as spam or, even worse, your domain getting blacklisted. That's where the email warmup process comes in. By gradually increasing your email volume, you demonstrate responsible email behavior, thereby gaining the trust of ESPs.

Now, let's delve into the top 3 benefits of warming up your domain:

  • Improved Deliverability: A well-executed IP warmup strategy can significantly boost your email deliverability rates. According to ReturnPath, senders with a high sender score (over 90) are likely to deliver 92% of their emails to the inbox, while those with low scores (below 70) achieve just 45% inbox placement.
  • Increased Engagement: When your emails land in the inbox instead of the spam folder, they're more likely to be opened and engaged with. This not only improves your open and click-through rates but also enhances your sender reputation.
  • Avoid Blacklisting: As mentioned earlier, sudden spikes in email activity can lead to your domain being blacklisted. By following a cold email warmup guide, you can avoid this disastrous outcome and ensure consistent email deliverability.


So there you have it, the importance and process of warming up your domain before launching your cold outreach campaign. It's a critical step that can make or break your email marketing efforts. But remember, manually managing this process can be time-consuming and complex. 

That's where Smartlead comes into play. With our AI-driven warmup feature, you can automate your entire email warmup process and ramp up your IP warmup strategy effortlessly. It's not just about following a cold email warmup guide; it's about setting yourself up for success. 

Take the first step towards perfected email deliverability. Sign up for a free trial of Smartlead today and let us help you warm up your email domains to perfection. Let's make every email count!

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Author’s Details

Arpan Sarma

I am a seasoned Digital Marketing Specialist and the Senior Content Writer at Smartlead. I collaborate with fintech, SaaS and technology companies and help them become thought leaders, generate more revenue and scale ahead of peers with actionable and data driven marketing strategies.


Edited by:

Arpan Sarma


Frequently asked questions

General Questions

What is Smartlead's cold email outreach software?

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Smartlead's cold email outreach tool helps businesses scale their outreach efforts seamlessly. With unlimited mailboxes, fully automated email warmup functionality, a multi-channel infrastructure, and a user-friendly unibox, it empowers users to manage their entire revenue cycle in one place. Whether you're looking to streamline cold email campaigns with automated email warmups, personalization fields, automated mailbox rotation, easy integrations, and spintax, improve productivity, or enhance scalability with subsequences based on lead’s intentions, automated replies, and full white-label experience, our cold email tool implifies it in a single solution.

What is Smartlead, and how can it enhance my cold email campaigns?

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Smartlead is a robust cold emailing software designed to transform cold emails into reliable revenue streams. Trusted by over 31,000 businesses, Smartlead excels in email deliverability, lead generation, cold email automation, and sales outreach. A unified master inbox streamlines communication management, while built-in email verification reduces bounce rates.
Additionally, Smartlead offers essential tools such as CNAME, SPF Checker, DMARC Checker, Email Verifier, Blacklist Check Tool, and Email Bounce Rate Calculator for optimizing email performance. 

How does the "unlimited mailboxes" feature benefit me?

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Our "unlimited mailboxes" feature allows you to expand your email communications without restrictions imposed by a mailbox limit. This means you won't be constrained by artificial caps on the number of mailboxes you can connect and use. This feature makes Smartlead the best cold email software and empowers you to reach a wider audience, engage with more potential customers, and manage diverse email campaigns effectively.

How does Smartlead as a cold emailing tool can automate the cold email process?

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Smartlead’s robust cold email API and automation infrastructure streamline outbound communication by transforming the campaign creation and management processes. It seamlessly integrates data across software systems using APIs and webhooks, adjusts settings, and leverages AI for personalised content.

The cold emailing tool categorises lead intent, offers comprehensive email management with automated notifications, and integrates smoothly with CRMs like Zapier, Make, N8N, HubSpot, Salesforce, and Pipedrive. Smartlead supports scalable outreach by rapidly adding mailboxes and drip-feeding leads into active campaigns Sign Up Now!

What do you mean by "unibox to handle your entire revenue cycle"?

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The "unibox" is one of the unique features of Smartlead cold email outreach tool, and it's a game-changer when it comes to managing your revenue cycle. The master inbox or the unibox consolidates all your outreach channels, responses, sales follow-ups, and conversions into one centralized, user-friendly mailbox.

With the "unibox," you gain the ability to:
1. Focus on closing deals: You can now say goodbye to the hassle of logging into multiple mailboxes to search for replies. The "unibox" streamlines your sales communication, allowing you to focus on what matters most—closing deals.

2. Centralized lead management: All your leads are managed from one central location, simplifying lead tracking and response management. This ensures you take advantage of every opportunity and efficiently engage with your prospects.

3. Maintain context: The "unibox" provides a 360-degree view of all your customer messages, allowing you to maintain context and deliver more personalized and effective responses.

How does Smartlead ensure my emails don't land in the spam folder?

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Smartlead, the best cold email marketing tool, ensures your emails reach the intended recipients' primary inbox rather than the spam folder. 

Here's how it works:
1. Our "unlimited warmups" feature is designed to build and maintain a healthy sending reputation for your cold email outreach. Instead of sending a large volume of emails all at once, which can trigger spam filters, we gradually ramp up your sending volume. This gradual approach, combined with positive email interactions, helps boost your email deliverability rates.

2. We deploy high-deliverability IP servers specific to each campaign. 

3. The ‘Warmup’ feature replicates humanized email sending patterns, spintax, and smart replies.
4. By establishing a positive sender reputation and gradually increasing the number of sent emails, Smartlead minimizes the risk of your emails being flagged as spam. This way, you can be confident that your messages will consistently land in the primary inbox, increasing the likelihood of engagement and successful communication with your recipients.

Can Smartlead help improve my email deliverability rates?

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Yes, our cold emailing software is designed to significantly improve your email deliverability rates. It enhances email deliverability through AI-powered email warmups across providers, unique IP rotating for each campaign, and dynamic ESP matching.
Real-time AI learning refines strategies based on performance, optimizing deliverability without manual adjustments. Smartlead's advanced features and strategies are designed to improve email deliverability rates, making it a robust choice for enhancing cold email campaign success.

What features does Smartlead offer for cold email personalisation?

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Smartlead enhances cold email personalisation through advanced AI-driven capabilities and strategic integrations. Partnered with Clay, The cold remaining software facilitates efficient lead list building, enrichment from over 50 data providers, and real-time scraping for precise targeting. Hyper-personalised cold emails crafted in Clay seamlessly integrate with Smartlead campaigns.

Moreover, Smartlead employs humanised, natural email interactions and smart replies to boost engagement and response rates. Additionally, the SmartAI Bot creates persona-specific, high-converting sales copy. Also you can create persona-specific, high-converting sales copy using SmartAI Bot. You can train the AI bot to achieve 100% categorisation accuracy, optimising engagement and conversion rates.

Can I integrate Smartlead with other tools I'm using?

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Certainly, Smartlead cold email tool is designed for seamless integration with a wide range of tools and platforms. Smartlead offers integration with HubSpot, Salesforce, Pipedrive, Clay, Listkit, and more. You can leverage webhooks and APIs to integrate the tools you use. Try Now!

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Is Smartlead suitable for both small businesses and large enterprises?

Smartlead accommodates both small businesses and large enterprises with flexible pricing and comprehensive features. The Basic Plan at $39/month suits small businesses and solopreneurs, offering 2000 active leads and 6000 monthly emails, alongside essential tools like unlimited email warm-up and detailed analytics.

Marketers and growing businesses benefit from the Pro Plan ($94/month), with 30000 active leads and 150000 monthly emails, plus a custom CRM and active support. Lead generation agencies and large enterprises can opt for the Custom Plan ($174/month), providing up to 12 million active lead credits and 60 million emails, with advanced CRM integration and customisation options.

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What type of businesses sees the most success with Smartlead?

No, there are no limitations on the number of channels you can utilize with Smartlead. Our cold email tool offers a multi-channel infrastructure designed to be limitless, allowing you to reach potential customers through multiple avenues without constraints.

This flexibility empowers you to diversify your cold email outreach efforts, connect with your audience through various communication channels, and increase your chances of conversion. Whether email, social media, SMS, or other communication methods, Smartlead's multi-channel capabilities ensure you can choose the channels that best align with your outreach strategy and business goals. This way, you can engage with your prospects effectively and maximize the impact of your email outreach.

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How can Smartlead integrate with my existing CRM and other tools?

Smartlead is the cold emailing tool that facilitates seamless integration with existing CRM systems and other tools through robust webhook and API infrastructure. This setup ensures real-time data synchronisation and automated processes without manual intervention. Integration platforms like Zapier, Make, and N8N enable effortless data exchange between Smartlead and various applications, supporting tasks such as lead information syncing and campaign status updates. Additionally, it offers native integrations with major CRM platforms like HubSpot, Salesforce, and Pipedrive, enhancing overall lead management capabilities and workflow efficiency. Try Now!

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Do you provide me with lead sources?

No. Smartlead distinguishes itself from other cold email outreach software by focusing on limitless scalability and seamless integration. While many similar tools restrict your outreach capabilities, Smartlead offers a different approach.

Here's what makes us uniquely the best cold email software:

1. Unlimited Mailboxes: In contrast to platforms that limit mailbox usage, Smartlead provides unlimited mailboxes. This means you can expand your outreach without any arbitrary constraints.

2. Unique IP Servers: Smartlead offers unique IP servers for every campaign it sends out. 

3. Sender Reputation Protection: Smartlead protects your sender reputation by auto-moving emails from spam folders to the primary inbox. This tool uses unique identifiers to cloak all warmup emails from being recognized by automation parsers. 

4. Automated Warmup: Smartlead’s warmup functionality enhances your sender reputation and improves email deliverability by maintaining humanised email sending patterns and ramping up the sending volume. 

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How secure is my data with Smartlead?

Ensuring the security of your data is Smartlead's utmost priority. We implement robust encryption methods and stringent security measures to guarantee the continuous protection of your information. Your data's safety is paramount to us, and we are always dedicated to upholding the highest standards of security.

How can I get started with Smartlead?

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Getting started with Smartlead is straightforward! Just head over to our sign-up page and follow our easy step-by-step guide. If you ever have any questions or need assistance, our round-the-clock support team is ready to help, standing by to provide you with any assistance you may require. Sign Up Now!

How can I reach the Smartlead team?

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We're here to assist you! You can easily get in touch with our dedicated support team on chat. We strive to provide a response within 24 hours to address any inquiries or concerns you may have. You can also reach out to us at support@smartlead.ai

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