Imagine your sales team is sending out tons of emails, but they’re ending up in spam folders. For SMB founders, CEOs, and sales managers, this is a major roadblock to productivity. As per a report, 45% of all emails sent daily are spam. That's roughly 14.5 billion spam emails every day! No wonder ISPs are so strict about email warmup to protect users from unwanted messages.

Without email warmup, you’re fighting against deliverability issues, and with less than 0.1% of Gmail inboxes receiving spam, you need to take action. Proper email warmup services gradually build trust, allowing you to send up to 2,000 emails/day while boosting open rates.

Fig: Global spam volume as a percentage of total e-mail traffic from 2011 to 2023 (Source: Link)

In this blog, we’ll explore why email warmup is essential, how to get started, and the best email warmup tools for your team.

What is Email warmup?

Email warmup is the practice of sending a limited number of emails at first and then gradually increasing that number over time. It builds the sender's reputation with email service providers (ESPs).

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You can accomplish email warmups by sending in small volumes, engaging with other emails (opening emails, replying, etc.), and gradually increasing volumes as your sender reputation improves.

Why Email warmup is Necessary?

Cold emails can be a game-changer for your business and sales strategy, but their success hinges on one critical factor: deliverability. Sending emails to the right inbox at the right time is essential, and that’s where email warmup comes into play. Without proper warmup, even the best-crafted emails can end up lost in the spam folder, costing you valuable leads and opportunities.

Reason for Gradually Increasing the Email Volume

Think of it like training for a marathon. You don't start by running 26 miles on day one. You build up your stamina gradually. Similarly, increase your email volume slowly to avoid triggering spam filters.

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The primary reason for the gradual accumulation of email volumes is that ESPs can identify the sender as a legitimate, trusted source.

Building a Strong Sender Reputation

Maintaining a good reputation as a sender is critical for long-term success in email marketing. Consistent sender warmup practices help maintain a high sender reputation and consequently enable regular email delivery.

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The email warmup process builds positive engagement and helps establish a reputation with ESPs and ISPs. If emails are sent too assertively or an account registered recently repeatedly marks them as spam, these actions might lead to IP block listing by ESPs.

"When it comes to email marketing, trust is built one message at a time."
Marketing Expert, Sarah Collins

This can ruin future email campaigns, making it impossible to reach your target audience.

Crucial for New Email Accounts and Domains

Email spam

When creating brand new email accounts or domains, they can wrongly categorize them as spammers. If there is no proper warmup procedure, such newer installations may face significant issues with emails going through, thus blocking any communication from potential clients or business partners.

When you sign up for a new email account or create your own domain, ISPs (Internet service providers) do not recognize this account as a known sender. That's why sending so many emails initially triggers an unusual spam filter response.

Skipping the Spam Filters and Boosting Deliverability

One of the main advantages of email warmup is its ability to help you avoid spam filters. By gradually building trust with ISPs, you significantly reduce the chances of your emails ending in the spam folder. 

This process ensures better email deliverability, crucial for businesses aiming to drive revenue through email marketing. According to a report by Campaign Monitor, email delivers an ROI of $42 for every $1 spent, but only when those emails reach their intended audience.

Better Engagement and Higher Open Rates

A warmed-up email account leads to better engagement. Open and reply rates naturally increase as your emails land inboxes rather than spam folders. HubSpot found that open rates for B2B emails hover around 21%, but with proper warmup, you can achieve even higher rates, leading to more meaningful conversations and sales.

Better Inbox Placement

The email warmup process ensures your messages land in inboxes rather than spam folders. By gradually increasing your email volume, ISPs recognize your sending behavior as trustworthy, improving inbox placement. With this gradual process, even well-designed email campaigns avoid being flagged as spam, harming your overall campaign success.

Consistency is critical to building trust with ISPs. A sudden surge in email volume raises red flags, triggering spam filters. Ultimately, email warmup aims to create a positive sender reputation, ensuring future emails reach your target audience's inboxes. This trust-building approach leads to higher open rates, better engagement, and more effective email marketing campaigns, positioning you for long-term success.

Readiness for Larger Campaigns

Once your email is adequately warmed up, you can confidently launch more extensive campaigns without risking your sender's reputation. This is crucial for businesses looking to scale their email marketing efforts. A well-warmed email account ensures that as you increase email volume, deliverability rates remain high, avoiding spam filters.

This process enables the smooth transition to higher volumes without compromising the success of growing businesses. With a strong sender reputation, you can scale effectively, focusing on crafting campaigns that engage your audience and drive results.

How to Warm Up Your Email the Right Way

If you are going to send less than ten emails? There is no need for AI email warmup services; save yourself the money and do a few warmups manually. If you are going to send 1000+ emails, then yes, using an automated email warmup service saves time and prevents emails from going to spam.

Manual warmup: DIY Approach

Warming up your email manually means sending small batches of emails to trusted contacts and slowly increasing the volume yourself.

This approach gives you complete control over the process but requires time and attention to detail.

Here's how to manually warm up your email:

  • Start by sending 10–20 emails per day to your most active contacts.
  • Gradually increase the volume by 10–20% every few days.
  • Track engagement rates (opens, replies, clicks) and adjust as needed.
  • After a few weeks, you'll be able to send larger campaigns without deliverability issues.

Pros and Cons of Manual warmup

Pros

Cons

Human-Like Engagement: Manual warmup allows for personalized interactions, which can signal to email service providers (ESPs) that is a real person.

Time-Consuming: Manual warmup requires significant time and effort

Control Over Content: Marketers can tailor messages to specific recipients, This can lead to better open and reply rates.

Requires Consistency: Inconsistent sending patterns can hinder progress.

Gradual Volume Increase: By manually increasing email volume, ensuring a more organic growth in sending reputation.

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Statistics and Insights for Manual warmup:

  1. Time Investment: Manual warmup can take several weeks, requiring daily engagement and consistent sending patterns. Marketers often need to send a small number of emails initially (e.g., 5-10 per day) and gradually increase this volume over time.
  2. Engagement Rates: Personalized emails sent manually can lead to higher engagement rates, with open rates often exceeding 30% if the content is relevant and targeted. This engagement is essential for producing a positive sender reputation.
  3. Risk of Inconsistency: Inconsistent sending patterns can lead to a drop in sender reputation, necessitating a restart of the warmup process. Manual efforts may lead to gaps in sending, negatively impacting deliverability.

Automated Tools: A Smarter, Faster Solution

For those looking for a hands-off approach, automated email warmup tools are the way to go. These tools can manage automatically sending, replying, and engaging with emails to build your reputation. Some of the best email warmup tools include features like email volume control, reputation monitoring, and detailed reports on email performance.

Pros and Cons of Automated warmup

Pros

Cons

Efficiency and Time-Saving

Automated tools free marketers to focus on other tasks.

Trust in Technology: 

Relying on technology requires confidence in its capability to mimic human behavior.

Consistent Engagement: 

Tools maintain engagement levels through simulated interactions.

Less Personalization: 

Lack of personal touch may alienate recipients if messages aren’t well-configured.

Advanced Features: 

Tools provide functionalities like sender health monitoring and spam checks.

Statistics and Insights for Automated warmup:

Email warmup software
  1. Efficiency: Automated tools can ramp up sending volumes significantly faster, often achieving optimal sender reputation within 1-2 weeks.
  2. Engagement Simulation: Automated tools simulate human-like interactions, which can lead to improved sender scores. Depending on the tool used and the initial sender reputation, tools can achieve up to a 50% increase in deliverability rates within weeks.
  3. Comprehensive Analytics: Most automated tools provide detailed reporting on metrics such as inbox placement rates, engagement rates, and spam complaints. This data allows marketers to make informed adjustments to their strategies. For example, tools can track the percentage of emails landing in the inbox versus spam, enabling proactive measures to improve performance.
  4. Cost-Effectiveness: Pricing for automated tools varies, but many offer competitive plans that can save time and resources.

TABLE OF KEY POINTS: MANUAL VS AUTOMATED warmup

Feature

Manual warmup

Automated warmup Tools

Personalization

High personalization and control over content

Less personalization; relies on automated messages

Time Investment

Significant time and effort; takes several weeks

Efficient and time-saving; faster ramp-up

Consistency

Prone to inconsistency; breaks can harm reputation

Consistent engagement; maintains levels automatically

Engagement Rates

Higher engagement rates; open rates can exceed 30%

Simulates human-like interactions for improved scores

Speed of Results

Gradual increase in sending volume; slower process

Achieves optimal sender reputation within 1-2 weeks

Analytics

Limited tracking; requires manual monitoring

Comprehensive analytics and detailed reporting

Cost-Effectiveness

No cost if done manually; only requires time

Pricing varies; often cost-effective with competitive plans

Best Use Case

Ideal for small campaigns or personalized outreach

Best for larger-scale campaigns or hands-off approaches

This is why tools like automated email AI services include this engagement in their services. For instance, tools like Alisha AI SDR will directly open and reply to emails on the people's behalf to guarantee that their reputation builds positively.

Common Email warmup Mistakes to Avoid

Warming up your email domain is crucial when it comes to cold emails. However, common mistakes—like aggressive ramp-up strategies and lack of engagement—can harm deliverability and lead to being blacklisted. All of these must be avoided to ensure the sender's reputation and, thus, a good run of the email marketing business.

Here are a few blunders that newbies make while starting their cold email marketing:

Sending too many emails too soon

You wouldn’t build a business overnight, so why would you expect to send 1,000 emails right out of the gate? The blunder people can make is by sending too many emails too soon. Which triggers spam filters, IP Blacklisting and damages your sender's reputation before you even get started.

Lack of Engagement

Just sending emails isn't enough—people need to engage with them. If no one opens or replies, it hurts your reputation. ISPs value regular, consistent behavior. Also, don't suddenly stop sending emails or increase your volume too quickly. ISPs value regular, consistent behavior.

Skipping Email Authentication

Without proper email authentication, ISPs may block your emails or send them straight to spam. Tools like SPF, DKIM, and DMARC help authenticate your emails, proving to ISPs that you're a legitimate sender. Skipping this step can harm your sender's reputation.

Authentication Technique

Purpose

Setup Process

Role in Email warmup

SPF (Sender Policy Framework)

Prevents spammers from sending emails from your domain.

Publish an SPF record with all your email senders.

Ensures your emails aren’t flagged as spam during warmup.

DKIM (DomainKeys Identified Mail)

Verifies that your domain sent the message.

Enable DKIM for your domain, use 1024 or 2048-bit keys.

Builds trust with receiving servers, improving deliverability.

DMARC (Domain-based Message Authentication, Reporting & Conformance)

Tells receiving servers what to do with messages that fail SPF/DKIM.

Publish a DMARC record for your domain.

Monitors email reputation and helps reduce spoofing during warmup.

ARC (Authenticated Received Chain)

Verifies the status of forwarded emails.

Handled by intermediaries like forwarding services.

Ensures forwarded emails pass authentication checks during warmup.

Make sure your email is authenticated before beginning the warmup process to avoid any deliverability issues.

Poor Email Content and Maintenance

High-quality, relevant content is essential to keep recipients engaged and maintain a positive sender reputation. No one likes boring emails! Regularly check your email performance reports to spot any potential issues before they affect your campaigns.

Choosing the Right Tool for the Job

When choosing an email warmup tool, consider the features that matter most to you.

For example, if you want full automation, look for a tool that can automatically handle sending, replying, and engaging with emails like Alisha AI SDR. If you prefer more control, look for tools that allow you to customize your sending volume and engagement settings.

Check out our page: Alisha - AI SDR for automating the replies and mails.

Alisha AI SDR

Wrapping-Up

Email warmup is essential for any business serious about improving email deliverability, engagement rates, and sender reputation. You avoid spam filters and improve inbox placement by gradually increasing your email volume and ensuring consistent engagement. For businesses looking to scale email marketing, warmup is a essential step that sets the foundation for successful, large-scale campaigns. With a well-executed email warmup, you can boost your chances of reaching potential leads and drive better sales performance.

Floworks, with its AI-powered Alisha AI SDR, simplifies the entire process of email warmup, helping businesses build a strong sender reputation effortlessly. Ready to take your email marketing to the next level? Watch Alisha at play!

Get started with Floworks today and ensure your emails land in the right inbox every time!


Frequently Asked Questions (FAQs)

What is an email warmup?

Email warmup is the gradual process of sending more emails from a new or inactive email address. This supports build the sender's reputation, lowering the chances of mails being flagged as spam or rejected by email providers.

What is a warmup for a new email?

Warming up a new email address means slowly introducing it to sending activity. Initially sending low volumes of emails and gradually increasing the frequency, you build a positive sender reputation with email service providers.

What is the best email warmup tool?

The best email warmup tools include Warmup Inbox, Mailwarm, and Lemlist. These tools automate the process, increasing your email-sending volume and interacting with recipients to boost engagement.

How long does email warmup take?

Email warmup typically takes 2 to 8 weeks, depending on the email service provider and the volume of emails. The length of the warmup period varies based on the account's initial reputation and activity.

Do email warming services work?

Yes, email warming services are effective. They help build a positive reputation for your email address by gradually increasing email volume and improving deliverability rates, reducing the chances of landing in spam folders.

How do I warm up my email server?

To warm up an email server, start by sending a small number of emails (20-50 per day) and gradually increase this volume over several weeks. Consistent interaction, like email opens and replies, is crucial to establishing a positive sending reputation.

What is a warm email list?

A warm email list consists of recipients who have previously engaged with your emails or have shown interest in your content. These contacts are likelier to open and interact with your emails, improving deliverability and engagement rates.

Is email warmup necessary?

Email warmup is necessary for new or inactive email accounts to build trust with email providers. Without warming up, sending many emails could be marked as spam, reducing your deliverability.

How do I check if my email is warmed up?

You can check if your email ID is warmed up by monitoring its metrics, such as deliverability, bounce rates, and spam reports. If your emails consistently land in inboxes and engagement rates improve, your address is likely warmed up. Some tools, like Warmup Inbox, also provide detailed progress reports.