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Importance of Email Warmup before Cold Outreach

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    Sending cold emails is important for brand integrity, lead generation, and outbound sales. However, if you send endless emails from a newly created account, clients may consider it suspicious and mark you as spam. Eventually, your email may pile up in their spam folders, cutting down on the outreach. The best way to resolve this issue is by increasing the IP reputation score through an email warm up tool.

    Email warmup (also called IP warming) includes sending low email volumes from a new account first and pacing up with time. It helps to increase the credibility, recognition, and delivery rate of an email account for better outreach.

    Benefits of email warm up before cold outreach

    The core benefit of email warmup is it helps ensure better activity and authenticity of a new account. But beyond that, this campaigns brings additional, irresistible perks, including:

    Increase Email Deliverability

    Email deliverability represents the total number of emails received by your contacts. When email deliverability is high, customers get to know about your brand product, services, and campaigns more. All this contributes to successful email marketing.

    Email warmup is a great way to increase the deliverability of your message. It helps to transfer the email to the Inbox instead of ending up in spam folders. This increases the visibility of your campaigns and ensures better reach throughout the audience.  

    Increases Sender Reputation

    Email sender reputation (ESP) is a score provided by internet service providers (ISP) to senders. If your ESP score is high, the sender reputation will be good. However, if the score is less, your ISP may direct emails to the spam folder, which may damage your reputation.

    Email warmup can enhance your sender reputation. As it involves a gradual increase in email volume, your ISP gets enough time to assess your email sending practice. Meanwhile, when they see normal email deliveries, they start considering you trustworthy and increase the sender reputation.

    Higher Open Rate

    As email warmup can increase your business visibility, you are likely to notice higher open rates. Email open rate indicates the number of people that open your emails. Thus, when the open rates are higher, it means the audience considers your campaigns relevant. For cold outreaching, an ideal email open rate should be 25% or more. This means you should get at least 50 replies from 200 sent emails.

    Keeps You Ahead of Competition

    While most email marketers know the benefits of email warmups, they do not implement the same. Thus, you can utilise this opportunity by following the practice and increasing the chance of staying ahead of the competitors. While their emails will end up in spam, yours will deliver to the Inbox for better interaction.

    4 Steps to warm up email

    Now that you know about the importance of email warmups, let’s learn about the steps on how you can do so:

    #1 Pre Warmup!

    First, decide on a real domain name for your brand. Instead of conventional “@gmail.com,” select a domain that features your business name. If your business name is “XYZ,” something like @xyz.com would be a good choice.

    Next, make a list of important information, like the number of emails and how frequently you will be sending them. Also, decide on when you will be increasing the email volume. 

    #2 Email Account Authentication

    Next, it’s important to ensure that your emails land up in the Inbox rather than the spam folders. For that, you need to authenticate your email account. Email authentication ensures that the emails come from the owners. It’s the best way to prevent cyber threats like phishing and spam.

    Some of the authentication methods in email marketing are:

    ✔ Sender Policy Framework (SPF)

    It is an email-authentication method that assures the receiver’s ISP about your authorization to send mails from a domain. It prevents you and the receiver from threats like spoofing, phishing, etc.

    ✔ Domain Keys Identified Mail (DKIM)

    It helps to add a digital signature along with the domain for better reach.

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

    It ensures the ESP’s recipient that the email is free from any deceiving activity. For that, it tracks both SPF and DKIM. 

    #3 Ensure Good Content Quality and Maintain Time Gap

    Develop good quality content for your email campaigns to ensure instant conversion. Adding spam fillers like “Free” or “Grab” is not going to help. Focus more on actionable content that encourages the users to read through. Keep your language crisp and straightforward for better understanding.

    Also, do not send consecutive emails in one go. It may damage your domain reputation or in worse scenarios, your account may get blocked too. Instead, maintain an adequate time interval between two emails.

    #4 Send Emails and Build Conversation

    Start sending emails to your acquaintances, including your family and friends. Also, try to make the emails more engaging to build conversations. Once the conservation increases, your ISP will consider your account genuine for email campaigns and increase the email volumes. Additionally, you can also maintain conversation threads with swift replies using your past email accounts.

    Also, do not send consecutive emails in one go. It may damage your domain reputation or in worse scenarios, your account may get blocked too. Instead, maintain an adequate time interval between two emails.

    Finally, get an email warm up tool

    Luckily, you can avoid the hassle of performing these steps and work smart using a reliable email warmup tool. One such recommended tool is Warmy.io.

    Our email warm up tool ensures automatic warmup of your email and domain. All you need to do is simply connect your mailbox, and its artificial intelligence engine (Adeline) will warm up the same.

    Sent emails will be removed from the spam folder and automatically marked as important for better sender reputation. Also, the progress monitoring feature of Warmy.io will keep you in control throughout the process.

    The best of all? The tool works 10x faster than the conventional method. Thus, you can stay assured of quick outcomes.


    In conclusion, the practice of email warmup is an indispensable step in the world of cold outreach. It’s not just about ensuring your emails land in the right inbox; it’s about establishing a solid foundation for effective communication. By gradually increasing your email volume and engaging with a receptive audience, you build a reputation with email providers, thereby enhancing your deliverability and credibility.

    This process, though seemingly simple, is pivotal in avoiding the pitfalls of spam filters and blacklists. In today’s digital age, where emails are a primary mode of communication, being heard amidst the noise is crucial. Email warmup does precisely that – it ensures your voice is heard, your messages are seen, and your outreach efforts yield fruitful results.


    Why is email warmup important for cold outreach?

    It's crucial for preventing your emails from being marked as spam, improving deliverability, and establishing a credible sender reputation, which is vital for successful cold outreach campaigns.

    Can I warm up an email account manually?

    Yes, you can manually warm up an email account by starting with a low volume of emails and gradually increasing the number over time while maintaining high engagement rates.

    Are there tools available to automate the email warmup process?

    Yes, there are several tools and services available that can automate the email warmup process, helping to manage the volume and frequency of emails sent.

    What happens if I skip the email warmup process?

    Skipping the warmup process can lead to your emails being flagged as spam, lower deliverability rates, and potential damage to your sender reputation.

    How do I know if my email warmup is successful?

    A successful warmup is indicated by a high deliverability rate, low bounce rate, and minimal marking of your emails as spam. You can track these metrics using various email analytics tools.

    Can warmup strategies vary for different email service providers?

    Yes, each email service provider has its algorithms and requirements, so it's beneficial to tailor your warmup strategy based on the specific provider's guidelines.

    Is email warmup necessary for all types of email accounts?

    While it’s most critical for new email accounts used for outreach, even established accounts can benefit from a warmup phase after a period of inactivity.

    What are the best practices during the email warmup phase?

    Best practices include maintaining a consistent sending schedule, prioritizing high engagement rates, gradually increasing email volume, and avoiding spammy content.

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